Ocun Diamond S

Ocun

The Diamond S is a medium-stiff, aggressively downturned velcro shoe from Ocun for bouldering and sport climbing. Typically sized 0.5 EU sizes below street size. Of 6 user reports, 4 rate the toes perfect and 4 rate the forefoot perfect. In stock at 11 shops from 89.90 EUR.

High-performance bouldering shoe designed for maximum precision. The asymmetric Excentric 2.0 last supports compressed toes for outstanding edge precision on micro-holds. Features innovative 3D midsole for efficient power transfer and large 3D-shaped CAT Rubber toe patch for precise toe hooks.

Best For

Best for bouldering and sport climbing on overhang, roof and vertical terrain. Aimed at advanced climbers.

Among the 469 adult climbing shoes we track, the Diamond S ranks in the top 5% for pocket climbing, the top 18% for hooking and the top 19% for edging.

Strengths & Trade-offs

Diamond S strengths

• Aggressive asymmetric profile for pockets
• Microfiber upper stays consistent
• CAT Rubber responsive feedback
• Czech quality engineering
• Curved for pulling through overhangs and roofs

Diamond S trade-offs

• Stiff microfiber demands break-in
• Steep price tag
• Medium volume restricts roomy feet

How the Diamond S fits

Typically sized 0.5 EU sizes below street size.

Medium volume suits standard feet. Narrow feet find perfect snugness here.

Fit profile: medium width, standard forefoot volume, narrow heel, suits egyptian, roman and greek toe shapes.

Minimal stretch expected; moderate break-in; manufacturer suggests street size to one size down.

How it fit climbers with your foot shape: fit reports from feet like yours.

Diamond S fit reports

Based on fit feedback from 6 owners who measured their feet with the climbing-gear.com foot scanner and rated this shoe at the toes, forefoot and heel (tight, perfect or loose).

Typical downsize: -0.5 EU from street size (n=6).

• Runs loose for: narrow forefoot

• Toes: 67% perfect (n=6) - 4 perfect, 2 tight, 0 loose. Mixed signals across foot types.
• Forefoot: 67% perfect (n=6) - 4 perfect, 1 tight, 1 loose. Mixed signals across foot types.
• Heel: 67% perfect (n=6) - 4 perfect, 0 tight, 2 loose. Mixed signals across foot types.

Stiffness

Measured stiffness: 0.47 on our 0-1 scale (0 = softest). Among aggressive shoes it sits between the La Sportiva Solution (0.43, softer) and the Evolv Shaman (0.51, stiffer).

Diamond S specifications

What the Diamond S costs

Prices checked 15 Oct 2026 across 11 shops that currently stock it (89.90 to 152.90 EUR). Cheapest current offer: 89.90 EUR at verticalextreme.de, 47% below the 170.00 EUR list price.

Prices by size

Cheapest in-stock price per EU size and how many shops list that size, from the EU pool. Updated daily.

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Prices, stock and owner fit data on this page update daily. You are welcome to cite these figures if you name climbing-gear.com and link to this page - see our data terms.