THOMSON ELITE X4 STEMThe design team for the new Thomson 31. 8 stems had a tough goal: make a stem better than the Thomson Elite Road and Mountain Stems. That was a tall order, given the popularity of the Elite models. They've done it, though - the new X4 is stronger AND lighter than before. It's designed around the 31. 8mm bar standard for increased stiffness and strength. The X4 incorporates a new steerer clamp design that shaves 20 grams, and of course, the beautiful design and machine work that have made Thomson famous, with a knee-friendly clamp and no welds to break. OK for use with carbon bars (always follow the mfrs. torque specs). Features90 degrees (0 degree rise), 100 degree (10 degree rise)Weight: 166g (100mm)7000-series aluminum Steerer clamp: 1 1/8Stack Height: 40mm Bar Clamp: 31. 8mm | Thomson | Elite X4 31. 8Mm Stem | Black | 90Mm, 10 Deg, 31. 8Mm | Aluminum