This downtube protector fits only the Small frame size for 29" and 6 Fattie models, but fits all sizes, (S,M,L,XL), for 650b models. For 29" and 6 Fattie bikes other than size Small, use part # S159900024 This item is used on the following models: Model Year Category Model 2017 CAMBER FSR CAMBER FSR COMP CARBON 29 2017 CAMBER FSR CAMBER FSR EXPERT CARBON 29 2017 SJ FSR SJ FSR COMP 29 2017 SJ FSR SJ FSR COMP 650B 2017 SJ FSR SJ FSR COMP 6FATTIE 2017 SJ FSR SJ FSR COMP CARBON 29 2017 SJ FSR SJ FSR COMP CARBON 650B 2017 SJ FSR SJ FSR COMP CARBON 6FATTIE 2017 SJ FSR SJ FSR EXPERT CARBON 29 2017 SJ FSR SJ FSR EXPERT CARBON 650B 2017 SJ FSR SJ FSR EXPERT CARBON 6FATTIE 2017 SJ FSR SJ FSR PRO CARBON 29 2017 SJ FSR SJ FSR PRO CARBON 6FATTIE 2017 SJ FSR SJ FSR SW CARBON 29 2017 SJ FSR SJ FSR SW CARBON 29/6FATTIE FRM 2017 SJ FSR SJ FSR SW CARBON 650B 2017 SJ FSR SJ FSR SW CARBON 650B FRM 2017 SJ FSR SJ FSR SW CARBON 6FATTIE 2016 CAMBER FSR CAMBER FSR 29 2016 CAMBER FSR CAMBER FSR 650B 2016 CAMBER FSR CAMBER FSR COMP 29 2016 CAMBER FSR CAMBER FSR COMP 650B 2016 CAMBER FSR CAMBER FSR COMP CARBON 29 2016 CAMBER FSR CAMBER FSR COMP CARBON 650B 2016 CAMBER FSR CAMBER FSR ELITE CARBON 29 2016 CAMBER FSR CAMBER FSR ELITE CARBON 650B 2016 CAMBER FSR CAMBER FSR EXPERT CARBON 29 2016 CAMBER FSR CAMBER FSR EXPERT CARBON 650B 2016 CAMBER FSR CAMBER FSR SW CARBON 29 2016 CAMBER FSR CAMBER FSR SW CARBON 29 MODULE 2016 CAMBER FSR CAMBER FSR SW CARBON 650B 2016 CAMBER FSR CAMBER FSR SW CARBON 650B MODULE 2016 RHYME FSR RHYME FSR COMP 650B 2016 RHYME FSR RHYME FSR COMP 6FATTIE 2016 RHYME FSR RHYME FSR COMP CARBON 650B 2016 RHYME FSR RHYME FSR COMP CARBON 6FATTIE 2016 RHYME FSR RHYME FSR EXPERT CARBON 650B 2016 RHYME FSR RHYME FSR EXPERT CARBON 6FATTIE 2016 SJ FSR SJ FSR CARBON 29 FRM I1 2016 SJ FSR SJ FSR CARBON 650B FRM I1 2016 SJ FSR SJ FSR CARBON 6FATTIE FRM I1 2016 SJ FSR SJ FSR COMP 29 I1 2016 SJ FSR SJ FSR COMP 650B I1 2016 SJ FSR SJ FSR COMP 6FATTIE I1 2016 SJ FSR SJ FSR COMP CARBON 29 I1 2016 SJ FSR SJ FSR COMP CARBON 650B ...