Road riders who spend most of their time on flat to rolling roads and want tight, close gear steps on an 11-speed Shimano drivetrain.
This is the 105 CS-R7000 in its 12-25T version: eleven nickel-plated steel sprockets running 12-13-14-15-16-17-18-19-21-23-25T. It is a close-ratio cassette, with one-tooth steps from 12T to 19T, so each shift changes your cadence only a little.
It uses Shimano's HG-EV design, which fits eleven gears while keeping the durability of the 10-speed era and the smooth HYPERGLIDE shift feel. It runs on HG 11-speed chains and fits Shimano road HG freehub bodies, and Shimano lists an average weight of 269 g.
Close-ratio 12-25T
One-tooth steps from 12T to 19T keep your cadence steady at speed.
HG-EV design
Shimano's rider-tuned 11-speed cassette design, with shifting that builds on HYPERGLIDE.
Nickel-plated steel
Eleven steel sprockets on an anodised aluminium spider, with a nickel-plated steel lock ring.
269 g average weight
Shimano's listed average weight for the 12-25T version.
Cassette
Fit and build
HG-EV
Shimano's cassette design for rider-tuned gearing and cadence management. It gives you eleven gears while keeping the durability of the 10-speed era and the improved HYPERGLIDE shifting.
Great for
Maybe not for
This is the 12-25T. Shimano rates its short-cage (SS) 105 R7000 derailleur for a largest sprocket of 25T to 30T, while medium-cage (GS) derailleurs start at 28T, so a 25T cassette pairs with a short-cage derailleur. Use an HG 11-speed chain and a road HG freehub body (spline L).
Match the cage length
Short-cage (SS) derailleurs suit a 25T largest sprocket, while medium-cage (GS) ones are rated from 28T. Tighten the lock ring to the 40 N·m marked on it, and check the chain length if you are changing cassette ranges.
