這類在shimano北美官網是被歸類在high grade components編號ST-R700 ST-R600 ST-R500的一體式煞變把分別對應10、9、8速官網描述:The ST-R700 was designed for people with smaller hands. By the use of a 4-degree or 8-degree shim, you can reduce the reach respectively by 10 or 20mm特徵就是他有墊片可以調節