Two lengths in one box, and it says what it will not fit
CNC V-brake blocks, 55 and 70 mm (2.76 in), 2 sets
Two sets of V-brake blocks in 55 mm and 70 mm (2.76 in) with the hardware to fit them, for mountain, BMX, folding and children’s bikes.
What you are getting
Two sets of V-brake blocks, front and rear, in both 55 mm and 70 mm, with hex nuts, shims and a hex wrench. Rubber on an aluminum alloy backing. Left and right marked. $8.99.
Two lengths in one box, which nothing else here offers
“Including 2 sets of front & rear 55 mm (2.17 in) / 70 mm (2.76 in) brake pads.”
Every other rim shoe in this group is one length: 50 mm (1.97 in), 55 mm (2.17 in) or 60 mm (2.36 in). This box covers two, and length is the fitment figure that decides whether a block sits on the braking surface or hangs off it.
For a household with more than one bike — a 20-inch child’s bike and an adult mountain bike, say — that is genuinely useful, and the fifth bullet is written for exactly that buyer: “mountain bike, road bicycle, MTB, BMX, kids bike, children’s bike, folding bikes.”
And it says what it does NOT fit, which almost nothing does
“Not applicable for disc brake bikes and racing drop-bar caliper road bikes.”
Two exclusions, both correct and both useful. A disc brake takes a pad in a caliper, not a block on a post — the three fiches already published on this shelf are those pads. And a drop-bar road caliper takes a cartridge holder, which is the Shimano BR-6700 set on this page.
Stating a negative is rare. The introduction to this shelf says pads “are cut to a specific caliper family and are not interchangeable”, and this is the one listing that spells out which families it is not for.
The hardware in the box is the smooth-post hardware
“Hex nuts and shims and 1 hex wrench for installation.”
That tells you the post type without saying it: shims are the curved washers that set a smooth-post V-brake block’s angle against the rim, and a hex nut clamps it. A threaded post — the Kool Stop BMX shoe on this page — needs none of that.
So this is a smooth-post block, and the shims are the part that lets you set toe-in.
Left and right are not interchangeable
“Each pair of V brake shoes has one left and one right brake pad, please recognize the mark before installation, prevent wrong installation.”
Said in the fourth bullet and again by Chooee on this page. A V-brake block is cut asymmetrically so the leading edge meets the rim first; fitted the wrong way round it squeals and wears unevenly. The mark is on the block.
The compound claim is about noise, not power
“Optimized rubber formula eliminates harsh brake squeal… the slightly curved brake rubber won’t damage the rim, effectively protecting your aluminum wheel rims.”
Squeal and rim wear, rather than stopping distance. That is a sensible thing for a budget V-brake block to claim, and the curved profile is the same idea as Chooee’s “subtly curved arc design”.
Note the rim it protects: aluminum. As with everything in this group, carbon is not claimed.
What is not published
No width, no weight, no compound name, no wear-limit figure. An aluminum alloy backing is softer than the steel the Shimano BR-CT91 uses, which matters on a block clamped hard by a single bolt.
Color options are listed in the third bullet, which is where a dimension should have been.
Availability
Read on the day this page was built: $9 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.
