Slots for the grit that wears rims out
Chooee V-brake blocks, 55 mm (2.17 in), 2 pairs
Two pairs of 55 mm (2.17 in) V-brake blocks in native rubber, with V-shaped slots to clear sand and water from the pad face.
What you are getting
Two pairs of 55 mm V-brake blocks in native rubber, with V-shaped sand guide slots, hex nuts, shims and a hex wrench. Left and right marked. $9.99.
The slots are the one design feature in this group
“Featuring V-shaped sand guide slots that effectively prevent damage from sand, mud, and stones to wheel rims, significantly enhancing the brake pads’ stopping power.”
Grooves cut across a brake block do two things. They give grit somewhere to go instead of being dragged round between pad and rim — which is what scores an aluminum braking surface and eventually wears a rim through. And they let water off the face in the wet.
No other rim shoe in this group has a named slot pattern. The CNC blocks on this page claim a curved profile; the Shimano shoes claim a compound. This claims drainage, and drainage is the mechanism behind most rim wear.
Two pairs of one length, against CNC’s two lengths
Chooee: two pairs, both 55 mm (2.17 in), $9.99 — a front and rear set for one bike, plus a spare set.
CNC on this page: two sets, 55 mm (2.17 in) and 70 mm (2.76 in), $8.99 — one length for each of two different bikes.
Same money, two different purchases. One bike with four blocks to go through, or two bikes with different arms.
And it gives a wheel-size floor, which is unusual
“Compatible with bicycles over 20 inches and all V-brake systems, such as SRAM, SHIMANO, and TEKTRO.”
A 55 mm (2.17 in) block on a 16-inch or 20-inch child’s wheel is long relative to the rim curvature: the ends lift off the braking surface because the arc is tighter. Chooee putting a floor on it is a real piece of information, and the only wheel-size statement in this group.
The CNC set covers the same ground differently, by including a shorter 55 mm (2.17 in) option alongside the 70 mm (2.76 in) for small bikes.
Native rubber, which is a material claim worth reading carefully
“Made by high quality native rubber, durable and No Noise No Skid.”
Native — natural — rubber has high friction and wears faster than a synthetic-blended compound; it is the traditional brake block material and it is quiet. “No noise no skid” is an absolute claim that no brake block can keep, and the useful part of the bullet is the material.
The Shimano M65T on this page claims a blend for wet and dry, which is the other approach: synthetic content to hold up when hot and wet.
Left and right again, and the same warning
“Each pair of brake shoes has one left and one right brake pad, please recognize the mark before installation.”
The second listing in this group to say it, after the CNC set. A V-brake block is cut asymmetrically for a leading edge; fitted backwards it squeals and wears on one corner.
What is not published
No width, no weight, no compound detail beyond “native rubber”, no wear-limit figure, and no statement of the backing material — where the CNC set names aluminum alloy and the Shimano BR-CT91 names steel. The rim is implied aluminum by the protection claim and never stated.
Availability
Read on the day this page was built: $10 at the American Amazon shop.
Read from Keepa on the day this page was last revised; stock and price both move without notice.
Prices quoted in this text were read on 2026-10-06. The live price is at the top of the page.
