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Our 172cc Big Bore engine kit increases the 150cc GY6 engine bore size from 150cc to 172cc
Even in these days of solid and tubeless tires
Or you can pay half the price and with a little tinkering of an Allen wrench and a pair of pliers replace just the spring
EV Rider: HW-74055043
R1 Heart Rate Monitor & Chest Strap with ANT+ Transmitter Dalton Medical SC-43 Our 172cc Big Bore engineThe Sigma R1 heart rate monitor & chest strap with an ANT+ transmitter is an excellent accessory for a ROX 10. 0 bike computer. The transmitter communicates its data via the ANT+ system directly to your ROX 10. 0. Wireless ANT+ transmitter Compatible with SIGMA ROX 10. 0, ROX 10. 0 GPS, and other ANT+ compatible devices Ultra light, comfortable, well fitting cloth strap