<!--ProdInc[170090026]/Mall:[rei_US]--> Completely silent and efficient, the upper and lower guides are easily set up for zero rubbing Design has no moving parts, so it won''t introduce drag into your drivetrain Full-sized upper and lower guides with quiet, TPU co-molded inner Nylon skid attached directly to integrated lower guide Fiber-infused bash protection lets you charge through rock gardens The SLR model features a thick carbon backplate for improved stiffness, weight and durability Works with 30?34T chainrings (28?32T oval chainrings) Compatible with 1x7-speed, 1x9-speed, 1x10-speed and 1x11-speed drivetrains Compatible with chainlines 50 mm and wider, including Boost 148 ISCG-05 mount Installs and adjusts with a single 4 mm hex (not included) Swingset hardware allows guides to rotate apart for easy chain installationMade in USA. Technical specs <table border=1 cellpadding=5 style=''border-collapse: collapse;''><!--[--><tr class=''tech-specs__row'' data-v-fc44804c=''''><th class=''tech-specs__header'' data-v-fc44804c=''''>Best Use</th><td class=''tech-specs__cell'' data-v-fc44804c=''''><!--[--><p class=''tech-specs__value'' data-v-fc44804c=''''>Mountain Biking</p><!--]--></td></tr><tr class=''tech-specs__row'' data-v-fc44804c=''''><th class=''tech-specs__header'' data-v-fc44804c=''''>Material(s)</th><td class=''tech-specs__cell'' data-v-fc44804c=''''><!--[--><p class=''tech-specs__value'' data-v-fc44804c=''''>Carbon fiber/TPU/nylon</p><!--]--></td></tr><tr class=''tech-specs__row'' data-v-fc44804c=''''><th class=''tech-specs__header'' data-v-fc44804c=''''>Weight</th><td class=''tech-specs__cell'' data-v-fc44804c=''''><!--[--><p class=''tech-specs__value'' data-v-fc44804c=''''>106 grams</p><!--]- <a href=''https://www.rei.com/product/237384/mrp-sxg-slr-chain-guide-icsg-05-mount'' target=_blank><img src=''https://www.antpop.co.kr/antMain/AntImgView?CustID=jellymom2&MallKind=US&MallID=rei&ProdInc=170090026&MallIDEncodeYes=0&SiteName=PostSelf'' width=''100px'' height=''20px'' border=0></a>