This is about wheel drive belts, chains and sprockets on dual belt or belt & chain models. The bigger the shaft sprocket, the more the torque or low end pulling power, while smaller provides more top speed. we offer 12 & 13 toothed hardened shaft sprockets. Wheel sprocket is the same principal. small=speed & large=torque/pull. Cobra & The Rock & Nuke are 20 tooth shaft/belt gear to 60 toothed wheel belt gear=ratio 1:3 which provides good speed on 9 inch tire. most other models are: 1:3.16 or 1:3.95 gear ratio which provides good torque. big wheel models are 1:5.1 select your factory or custom gear ratio by selecting 1 of 2 available #35 Chain Drive shaft/hub mount sprockets and many different wheel plate style sprockets. shaft sprockets have set screw, but must be welded to shaft after determining correct position & tracking. wheel sprockets are bolt on. call scooterman @ 256.468.2761 u.s.a. english for assistance in ordering custom chain drive.

12:52 Chain Drive Big Wheel Speed Kit #35 Chain Drive Kit 12:52 Replaces: 1000-5M-15 belt 1000-5M-18 belt 1000-5M-20 belt #35 ansi roller chain kit for: Chuweng Raser big wheel with 145/70-6 size tires and 6 inch wheels. Also FITS Xcooter Thunder, Saloor Big Wheel, Sonic Big Wheel, THS Big Wheel, Desert Storm Big wheel, Steeple Big Wheel, PanthR Big Wheel, AND OTHER MODELS using 145/70-6 rear tire. Kit includes #35 ansi chain & master link (This chain is 128 pins including master link) a 12 tooth #35 shaft sprocket and a 52 tooth #35 wheel sprocket, one 1/8 roll pin and one 1/8 inch drill bit. This 12:52 kit is a gear ratio of 1:4.3 The factory sprocket on the shaft is 20 tooth and the factory wheel sprocket is a 102 tooth 5m belt drive. The factory gearing is 1:5.1 This chain drive set is 1:4.3 For factory chain drive gear ratio of 1:5 see our 12:60 Chain drive kit for big wheel scooters. This 52 tooth sprocket is the same as oem sprocket for "The Rocky" but the shaft sprocket is totally different so this is not for "Cobra Extreme" or "The Rocky"

12:60 Chain Drive for Big Wheel OEM gear ratio Kit #35 Chain Drive Kit 12:60 Replaces: 1000-5M-15 belt 1000-5M-18 belt 1000-5M-20 belt #35 ansi roller chain kit for: Chuweng Raser big wheel with 145/70-6 size tires and 6 inch wheels. Also FITS Xcooter Thunder, Saloor Big Wheel, Sonic Big Wheel, THS Big Wheel, Desert Storm Big wheel, Steeple Big Wheel, PanthR Big Wheel, AND OTHER MODELS using 145/70-6 rear tire. Kit includes #35 ansi chain & master link (This chain is 128 pins including master link) a 12 tooth #35 shaft sprocket and a 60 tooth #35 wheel sprocket, one 1/8 roll pin and one 1/8 inch drill bit.The factory sprocket on the shaft is 20 tooth 5m and the factory wheel sprocket is a 102 tooth 5m belt drive sprocket. The factory gearing is 1:5.1 This 12:60 chain drive kit is 1:5 ratio For top speed chain drive kit on a "Big Wheel Scooter" see our 12:52 kit which is a gear ratio of 1:4.3 and a Chain drive kit for big wheel scooters only, see exclusion below. This 52 tooth sprocket is the same as oem sprocket for "The Rocky" but the shaft sprocket is totally different so this is not for "Cobra Extreme" or "The Rocky"

#35 Sprocket For Big Wheel. 60 tooth hardened sprocket p/n 2299k321

This belt will fit our "Big Wheel" Scooters, BUT!! (It is weak) compared to the 5m-18 factory belt. We have even found that slight Shimming to Xcooter Thunder a.k.a. Raser Big Wheel a.k.a. PanthR models that have 102 tooth aluminum wheel sprockets with lip out can be shimmed behind sprocket to allow for running even 5m-20 belts. Not sure about Salorr Big Wheel model using 5m-20 yet without fipping both sprockets and maybe replacing wheel sprocket from plastic to aluminum 102 tooth sprocket from Chuweng.

1000-5M-18 BELT for big wheel models only such as Chuweng Raser "Big Wheel" & xcooter thunder & Salorr & Star II & Grizzly & PanthR & THS 04, THS 05. and others using 102 tooth 5m wheel sprocket This belt will fit our "Big Wheel" Scooters, BUT!! We have even found that slight Shimming to Xcooter Thunder. Atx 1000 a.k.a. Raser Big Wheel a.k.a. PanthR models that have 102 tooth aluminum wheel sprockets with lip out can be shimmed behind sprocket to allow for running even 5m-20 belts. Not sure about Salorr Big Wheel model using 5m-20 yet without fipping both sprockets and maybe replacing wheel sprocket from plastic to aluminum 102 tooth sprocket from Chuweng.

1000-5m-20 Belt Requires Sprocket shimming or swap or modification for use. We have even found that slight Shimming to Xcooter Thunder. Atx 1000 a.k.a. Raser Big Wheel a.k.a. PanthR models that have 102 tooth aluminum wheel sprockets with lip out can be shimmed behind sprocket to allow for running even 5m-20 belts. Not sure about Salorr Big Wheel model using 5m-20 yet without fipping both sprockets and maybe replacing wheel sprocket from plastic to aluminum 102 tooth sprocket from Chuweng.

1000 Belts that are 20mm Wide need Spacer/Shim for wheel sprocket to allow use of 1000-5m-20 belt.

102 tooth 5M Aluminum Belt Wheel Sprocket Fits Xcooter Thunder, Raser, Salorr, Star II Big Wheel For use with 1000-5m-18 or now 1000 5m 20 belt With the use of a scootR sprocket spacer disc

140 millimeter Brake Rotor With 44mm bolt spacing cobra extreme or Rocky rear disc brake rotor . Fits other models as front and rear brake rotor. also fits Chuweng models like THS & Raser & xlt pro SCOOTR R5 & Salorr & Star II & Raser FX

145/70-6 Atv tread tire

160 millimeter Brake Rotor With 44mm bolt spacing cobra extreme or Rocky Front disc brake rotor Also fits front & rear on: CHUWENG BIG WHEEL SCOOTERS Raser big wheel, Star II, Salorr, PanthR, THS 04, THS 05, Grizzly etc