Good value tiagra calliper brake super slr dual pivot design keeps operating friction to a minimum improving braking performance must be used in conjunction with st 4600 st 4603 st 5700 st 5703 st 6700 or st 7900 stis for correct leverage ratio enhanced brake arch proportions give a quicker linear response and increased power 49 mm drop lightweight aluminium calliper design with tough anodised finish toe in adjustable brake shoes for perfect pad alignment durable quick release for fast and