Choosing a Rope: The 1, ½ and ∞ on the Rope End, 9.5 or 9.8, How Long, Dry or Not, Plus 10 Current Entry-Level Single Ropes

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You've been climbing in the gym for a while, borrowing a friend's rope or using the gym's. Now you want your own. A retailer's site shows one brand in several diameters and several lengths, some labelled dry and some not, and prices that can differ by a factor of two.

This is post 8 of the Climbing Gear series, and it answers one question: which rope to buy first. The reader we have in mind is a Taiwanese climber who leads in the gym and sometimes goes to single-pitch crags like Longdong. It doesn't cover how to belay; that's in gym top-rope belaying and gym lead climbing. For taking a rope abroad, or whether to buy 80 m or a thin rope, see Choosing a Rope for Climbing Trips. By the end you should be able to read a rope-end label, decide on diameter, length and dry treatment, and pick one or two ropes from the table below.

Six criteria

1. Rope type: read the 1, ½ or twin symbol on the rope end

The UIAA 101/EN 892 pictorial requires a dynamic rope to be marked with its type (EN 892 requires durable bands; UIAA 101 also allows marking printed directly on the rope):

• A 1 in a circle: single rope.
• A ½ in a circle: half rope.
• Two linked circles (often written ∞; the label may also say TWIN): twin rope.

The label also gives length, diameter, year of manufacture and manufacturer.

The three types are three different systems. From Black Diamond's rope guide:

• Single: the most common; one rope is enough, used in gyms, at sport crags and on multi-pitch. BD says singles run from about 8.8 to 10.2 mm.
• Half and twin: used two at a time, usually thinner (BD says mostly under 8 mm), mostly in the mountains. Twins are clipped together through every piece, functioning more like a single rope.

Diameters overlap, so millimetres alone won't tell you. Mabu Valley's guide to dynamic ropes (in Chinese) is clear: single, half and twin are different systems whose diameters can overlap, so check the end marking before the diameter. Some thin ropes are certified as both half and twin, like the 7.4 mm rope in BD's guide; either use is fine, but always as a pair.

If you climb only in the gym and at single-pitch sport crags, you want a rope marked 1.

Something you can do tonight: at the gym, look at the end of the rope you're using. Find the circled symbol, the diameter and the year of manufacture.

2. Dynamic, not static

Mabu Valley explains that in a lead fall, dynamic rope absorbs energy by stretching in a controlled way, lowering the instantaneous load on the whole belay system. Low-stretch rope (commonly called static rope) is for fixing, ascending, descending and rope access, not for catching lead falls. BD agrees: you're not going to lead on a static rope; it's for jugging and hauling.

EpicTV's rope primer makes the same point: static ropes lack the dynamic stretch a fall needs, and are for industrial work or hauling on big walls, not for climbing (EpicTV, 2024).

Impact force: the more the rope stretches, the less it hurts

Picture falling from above your last quickdraw. The force on you, your belayer and the quickdraw at the instant the rope catches you is the impact force. The more the rope can stretch in that instant, the longer you take to slow down, and the lower the impact force. That's why lead climbing always uses dynamic rope.

Think of it in reverse, too: DAV's 2010 article on gear lifetime (in German) says a rope's dynamic properties decline as it ages. Mammut's rope-care page says a fall above fall factor 1.0 compromises a rope. What fall factor is, and how much force an anchor takes in a fall, is in building anchors.

Something you can do tonight: look up the rope you're considering and check whether the product page states EN 892 and the rope type. If it doesn't, drop it from your shortlist.

3. Diameter: durable or light

BD splits single ropes into three bands:

• 9.5 mm and up: durable workhorses; BD says they hold up to seasons of use at the crag.
• Around 9.4 mm: all-rounders, between light and durable.
• 8.8 mm and under: high-performance, lightweight ropes for redpoints or when weight counts.

By BD's split, thicker ropes buy durability and thinner ones save weight. Where a first rope should sit between 9.5 and 10 mm is something the videos disagree on:

• Go thicker: EpicTV recommends a dedicated gym rope and a dedicated outdoor rope, with the gym one ideally 10 mm or more, such as the Edelrid Python, to stand up to constant falls. Nomads With A Purpose also says 10 mm and up suits beginners who'll top-rope a lot.
• 9.7 and up: UKClimbing's Beal Booster III review says that at crags with short routes and lots of big falls, thinner ropes wear out fast, while 9.7 and up is much more durable and easier to grip.
• 9.5 to 9.8: Brant Hysell of The Gravity Lab suggests starting in the 9.5 to 9.8 range. Ben of Hard Is Easy calls 9.5 a good all-rounder but wouldn't go below 9.5 for a first rope, because it needs to last; in the same video, HowNOT2's Ryan prefers 9.8 for longevity.
• 9.5 is enough: UK climbing instructor JB Mountain Skills says a 9.5 is all you need for a first rope; he finds 9.8 too thick, trading handling for durability.

The evidence for each view is in the video section below.

Diameter also has to match your belay device. Thin ropes are harder to grip, thick ones harder to pay out; every device's manual lists compatible diameters, and the GRIGRI, for example, works best on 8.9 to 10.5 mm. Watch the upper limit in particular: the Edelrid Giga Jul only goes to 10 mm, so a 10 mm rope is already at the top. Ranges for each model, and how to read them, are in this series' belay device post; the locking carabiner that clips the device to your harness is in carabiners.

Something you can do tonight: find the manual for your belay device (or your usual partner's), and write down its compatible and optimal diameter ranges. Your candidate rope should fall within the optimal range.

4. Length: 60, 70 or 80 m

BD:

• 60 m: mountain routes with long approaches and frequent unroping, or multi-pitch with a tag line.
• 70 m: BD calls this the standard for cragging and multi-pitch today; many rappels and pitches are set up for it.
• 80 m: sport crags with long routes; and if you take a lot of falls, you can cut off worn ends and still have plenty of rope.

The gym doesn't need that much, but gyms differ. The Gravity Lab says a standard gym rope is about 45 m, and HowNOT2's Ryan also says to ask your gym what length to get. Outdoors depends on the area: The Gravity Lab suggests 70 m at minimum; Ryan's examples are Spain, where many routes are nearly 40 m tall and you need an 80 m rope to get down, and Yosemite, where he owned nothing but a 60 m for his first 15 years of climbing.

Cutting a rope down is how many climbers actually use it. JB Mountain Skills says ropes usually wear at the ends first; a 60 m becomes a 50 m once trimmed, and eventually a 40 m gym rope.

The most direct consequence of a short rope is the end slipping through the belay device while lowering. Outdoor belaying cites American Alpine Club figures showing over half of lowering accidents in a decade had this cause; first outdoor sport lead covers checking route length before you go. Whatever the length, tie a stopper knot in the end.

Something you can do tonight: call or message your gym and ask how tall the lead wall is. Then look up the crag you want to visit, find its longest route, and double it. That's the minimum rope length you need.

5. "Dry" isn't always water repellent

Many ropes are labelled "dry", meaning water-repellent treatment. BD says dry treatment adds some durability and allows use in icy conditions. But "dry" on the label doesn't mean the rope passed a water-repellency standard.

The UIAA standard for water-repellent ropes, published in 2014, works like this: the whole sample is lightly abraded, equivalent to a few days' use, then soaked for 15 minutes following a set procedure. To be labelled "UIAA Water Repellent", it must absorb no more than 5% of its weight in water. For comparison, an untreated rope absorbs around 50% in this test, and ropes labelled "dry" with inadequate treatment absorb 20–40%. The UIAA's announcement quotes rope maker Beal: ropes with surface treatment only can't pass.

So if you need genuine water repellency (ice, alpine), look for "UIAA Water Repellent", not just "dry".

Hard Is Easy ran this test start to finish in Mammut's lab; start at 27:23. The sample is first worked back and forth over bolts to fuzz it up, then water runs over it from above for 15 minutes before it's spun dry and weighed. The UIAA announcement says "soaked", while the lab demonstrates a steady pour with the rope not fully submerged; for the exact procedure, the standard itself is the authority, and the video simply shows what "abrade, then wet" looks like. Ben ends on the same point as this section: a treatment is not the same as passing UIAA Water Repellent. It's one sample, run by Mammut staff.

So does a first rope need to be dry? The videos disagree. EpicTV says dry ropes cost more and pay off where you'll meet snow, ice or water; Nomads With A Purpose says single-pitch sport climbing doesn't require it, though it keeps a rope cleaner and extends its life; The Gravity Lab says that unless the price gap is huge, he always buys dry, because it repels water and dust and lasts longer. These are user opinions, not measurements.

Something you can do tonight: on your candidate rope's product page, see whether the water-repellency field says "UIAA Water Repellent", "dry cover" (sheath only), or nothing. Those are three price tiers.

6. Where to buy: check certification, and be wary of very cheap rope

JB Mountain Skills' view is that a rope from a proper rope maker is safe: he has used Decathlon ropes, which didn't handle as nicely as expensive ones but were still safe; what to avoid is an unknown rope off a marketplace like Temu. Brant of The Gravity Lab recommends sticking to dedicated rope makers, naming Edelrid, Beal and Mammut; that's his personal preference.

In Taiwan, the only shop we confirmed is Mabu Valley, which lists four Beal ropes: Karma 9.8, Booster III 9.7, Zenith 9.5 and Top Gun II 10.5 (checked 2026-10-24). We didn't check Taiwanese retailers for other brands one by one; ask your local shop what it has in stock.

Something you can do tonight: if you've seen an unusually cheap "climbing rope" on a marketplace site, look for its EN 892 marking and a photo of the rope end. If you can't find them, skip it.

10 current entry-level single ropes

Only single ropes still sold on the manufacturer's site and suited to a first rope are listed, all between 9.5 and 10 mm; specs are from manufacturer pages.

• Prices: manufacturer list prices, checked 2026-10-24.
• More options: for thinner, lighter or 80 m ropes, see the larger table in Choosing a Rope for Climbing Trips.

Why the BD 9.9 isn't here: the Black Diamond 9.9 lists at USD 139.95 for 40 m, no cheaper than the same length of Mammut 9.8 Crag Classic or Sterling VR9 (10-24); its 34% sheath proportion is lower than every rope in the table above; and OutdoorGearLab's 2026 comparison ranks it 16th of 16. Nomads With A Purpose also warns against buying it as a first rope just because it's cheap, saying it kinks and core-shots easily, based on their own and friends' experience.

Affordable and available in Taiwan: the Beal Karma 9.8. Mabu Valley stocks it, but its 33% sheath and 5 UIAA falls are on the low side for this comparison, so it isn't in the table.

Left out: the Petzl CONTACT 9.8, MAMBO 10.1 and Edelrid Heron Eco Dry 9.8 have suitable specs, but we found no post-2024 reviews; they're in the table in Choosing a Rope for Climbing Trips. The Maxim Glider 9.9 is hard to buy outside the US; the Simond Vertika 9.5 (Decathlon) isn't on Decathlon Taiwan's site.

Test and review videos

Below are six, all uploaded in 2024 or later, each checked against its captions. Some come from channels that run their own gear shop or earn commission on links; each one says so.

HowNOT2 and Hard Is Easy's joint intro to sport climbing gets to ropes at 19:59. Ben of Hard Is Easy says dynamic single ropes now run roughly 9 to 10 mm, with 9.5 a good all-rounder and what he uses most; he doesn't recommend going skinnier because thin ropes don't last, and wouldn't go below 9.5 for a first rope. HowNOT2's Ryan prefers 9.8 so it lasts a long time. From 21:07 they cover length: in the gym, ask the gym; in Spain many routes are nearly 40 m, so you want an 80 m; a 70 m works well where Ryan now lives in Washington, and in Yosemite he owned only a 60 m for 15 years. From 23:36 they show keeping the rope on a rope bag or tarp with both ends tied, out of the dirt. In the video they say no one sponsors the channel and gear sales from their own shop pay for it; the description links the shop and a radio discount.

This EpicTV episode is a rope-choosing primer. From 1:09: they recommend a dedicated gym rope and a dedicated outdoor rope, because outdoor ropes collect dirt and wear faster; a gym rope should ideally be 10 mm or more, such as the Edelrid Python, a bit shorter and durable enough for constant falls. From 4:40 they say static ropes aren't for climbing, and from 5:00 that dry ropes cost more and suit places with snow, ice or water. EpicTV runs its own online shop, and the description and the closing both point to it.

Brant Hysell of The Gravity Lab covers what gear a beginner actually needs, and ropes start at 6:57: begin with 9.5 to 9.8 mm and at least 70 m; for extra insurance get an 80 m, which still leaves 70 m after chopping 5 m off each worn end. He recommends sticking to dedicated rope makers, naming Edelrid, Beal and Mammut; his first ropes were Mammut Crag Classics. Unless the price gap is huge, he always buys dry or double dry. Earlier, at 5:24, he covers the gym: a standard gym rope is about 45 m, so ask the front desk. The gear links in the description all go through the Rockporch shopping platform, with no written commission disclosure.

Nomads With A Purpose's 10-rope comparison includes four ropes from this post's table or left-out list: the Mammut 9.8 Crag Classic, We Care Classic, Sterling Velocity and BD 9.9. At 0:23 they explain that the list cross-references recommendations from Mountain Project, Reddit and their own community, and that they haven't tested every rope. From 3:55: the Crag Classic 9.8 is their best all-round pick, and the host has recently been using one; from 5:19 they warn against buying the BD 9.9 as a first rope just because it's cheap. The video calls the We Care Classic 9.8 mm; the maker's spec is 9.5. The description and the closing both say they earn commission on the links.

UKClimbing tests the Beal Booster III 9.7 and represents the "9.7 and up" view. From 0:26: sport ropes are trending towards 9.5, but 9.7 gives more to grab and is easier to control in a GRIGRI or ATC; at crags with short routes and big falls, a 9.2 or 9.5 wears out quickly. From 1:37 he covers the microchip in the rope end, which you scan with a phone to see manufacturing details and log use; he suggests keeping the chipped end if you cut the rope. The description doesn't say whether the rope was supplied by the maker.

The opposing view comes from UK climbing instructor JB Mountain Skills. From 8:08 he compares several Mammut ropes: the We Care Classic wears a bit faster than the solid-colour version but is cheap and durable. From 9:03 he says "9.8 for me in 2026 and beyond, it's too thick really"; buy a 9.5 as your first rope, and the dry version if you can afford it. Then length: 60 m is the best all-rounder in the UK, and as its ends wear it gets cut down until it becomes a 40 m gym rope. From 11:45 he says Decathlon ropes don't handle as nicely as expensive ones but are still safe, as long as you're not buying off something like Temu. He mentions that the shop Outside supports the channel, and the description has a tip-jar link.

Among Chinese-language videos, we found none from 2024 or later by Taiwanese or other Chinese-speaking climbers comparing specific rope models or sharing how they chose a rope.

Choosing for three situations

Gym lead only

• Length: ask how tall the walls are and what length the gym recommends. The Gravity Lab says a standard gym rope is about 45 m; the Edelrid Python comes in 30 and 40 m, the Mammut 9.8 Crag Classic in 40 m.
• Diameter: go thicker, 9.8 to 10 mm; EpicTV suggests 10 mm and up. Dry treatment isn't essential; get a rope bag.

Gym plus single-pitch crags like Longdong

• Length: look up the routes you plan to climb and double the longest. BD calls 70 m today's crag standard; 60 m works too, and becomes a gym rope once it's trimmed.
• Diameter: 9.5 to 9.8 mm. Start with the Mammut 9.8 Crag Classic, 9.5 Crag Classic or Sterling VR9.
• To buy locally in Taiwan: the Beal Booster III 9.7 (stocked by Mabu Valley).

Seaside, humid or sandy crags

• Choose a treated rope: the Mammut 9.5 Crag Dry and Sterling Velocity XEROS are fully treated; the Booster III treats only the sheath.
• Wash the rope when it gets sandy. Mammut says a clean rope lasts longer and can go in a washing machine; the steps are in its care instructions.
• For taking a rope abroad, or an 80 m or lighter rope, see Choosing a Rope for Climbing Trips.

Inspection and retirement

• Ends wear first: JB Mountain Skills says it's nearly always the ends that wear first. Mammut recommends pulling the whole rope through your hand, feeling and looking for cuts, spots much thicker than normal, sections that feel stiff or very soft, discolouring, and exposed core. Damage in the middle means retirement; near the ends, you can cut it off and keep using the rope.
• Record the length after cutting: Mammut's method is to measure again, re-mark the middle and write the new length on the tape at the end, so you don't miscalculate the next time you check a route. On chipped ropes like the Beal Booster III, UKClimbing suggests keeping the end with the chip.
• After a big fall: Mammut says a fall above fall factor 1.0 compromises a rope.
• Keep the rope out of the dirt: HowNOT2 and Hard Is Easy show flaking it onto a rope bag or tarp; when it gets dirty, wash it following Mammut's instructions.

The full inspection and retirement rules are in the last post of this series, inspecting and retiring climbing gear.

Practice: four scenarios

Answers are under each question. Think first, then look.

1. You find an 8.9 mm rope marked ½ and with the twin symbol, cheaper than single ropes, and want to lead on it at the crag.

2. A rope in the shop says "dry", and the staff say it's "fully waterproof, fine for ice climbing."

3. On a marketplace site you see a "climbing rope" at half the usual price for 60 m, and the product page shows no EN 892 or rope-type marking.

4. You only lead in the gym, and its walls are 15 m tall. A friend recommends an 80 m, 9.2 mm lightweight rope, "so you can take it abroad later too."

Next

With your own rope, the next thing to learn is the short loop of thin cord you tie onto it: a backup on rappel and a way to climb the rope in self-rescue. That's post 9: Prusik cord.

Further viewing: gear-testing and instruction channels

Several videos in this post come from the two channels below. They're a good place to keep digging; keep each channel's limits in mind.

• HowNOT2: run by Ryan Jenks. It started in 2016 as highline safety instruction and grew into breaking climbing, caving and canyoneering gear, plus the Bolt Busters series that pulls bolts out of real rock. Its value is in the cases beyond the rated number: knots, wear, old gear, bad placements. Limits: most tests are slow pulls on a home-built rig with one to three samples, and Ryan himself calls it entertainment, not science; the channel is backed by an online gear shop, and some tested items are sold there.
• Hard Is Easy: run solo by a climber who signs as Ben, a former software developer. After watching a hard catch slam a climber into the rock in Tonsai, Thailand, he designed his first experiment; the channel now focuses on experiments and physics explanations about belaying, ropes, carabiners and belay devices, with several recent episodes filmed in Mammut's lab. Limits: most experiments are his own design, not EN/UIAA standard tests.

References

Manufacturer product pages and prices are linked in the table above (the date each price was checked is in the table).

• EN 892/UIAA 101 Dynamic Mountaineering Ropes pictorial (UIAA, 2020)
• New UIAA standard developed for water repellant ropes (UIAA, 2014-02-26)
• How to Choose a Climbing Rope (Black Diamond)
• Ropes: care instructions (Mammut)
• What is a dynamic rope? Single, half and twin ropes (Mabu Valley, 2026, in Chinese)
• Lebensdauer von Alpinausrüstung (DAV Panorama 5/2010, in German)
• Best Climbing Rope (OutdoorGearLab, 2026)
• Black Diamond 9.9 Review (OutdoorGearLab, updated 2026-08-19)
• Best Climbing Ropes (GearJunkie, 2026)
• Best Climbing Ropes (Switchback Travel, 2026)
• Every Test Climbing Ropes Have to Pass (Hard Is Easy, 2024-10-08)
• Intro to Sport Climbing ft. Hard is Easy (HowNOT2, 2025-01-09)
• Watch This Before Buying Your First Climbing Rope (EpicTV Climbing Daily, 2024-05-17)
• Watch This Before Buying Climbing Gear in 2026! (The Gravity Lab, 2026-04-24)
• 10 Best Climbing Ropes Compared (Nomads With A Purpose, 2024-12-29)
• Beal Morpheus Harness & Booster III Rope Tested (UKClimbing, 2026-07-10)
• The Single Rope Lowdown! What First Rope to Buy? (JB Mountain Skills, 2026-09-15)
• Comparing Sterling Ropes: VR9, Velocity XEROS and IonR (Sterling Rope, 2026-03-02)
• Gym top-rope belaying
• Gym lead climbing
• Outdoor belaying
• First outdoor sport lead
• Building anchors
• Choosing a Rope for Climbing Trips