Genuine Shimano Alivio BR-T4000 V-Brakes are a very worthwhile investment - especially if your bikes V-brakes no longer engage and release as they once did. aluminium brake caliper. 107 mm brake arms for a better distance to the mudguard. Adjustable spring tension. Brake pads: S65T. Weight: approx. 188 g. Rear wheel. Incl. 90° pipe.