The NB Helical 4GS is a next-level gear drive for EMTB. They're a novel design that maintains compatability with most hubs and trucks on the market. Unlike standard gear drives, the NB 4GS will provide you with the most smooth gear drive experiences on the market. It's so smooth and quiet it's hard to tell that you're riding on gear drives!
Why 4 Gears?
Our 4 gear design can extend the lifespan of the gears since it improved the gear contacts and split the transfer power between the two slave gears！
4 gears will give you a super quiet riding experience. Most of the noise you hear during the ride is from the motors!
4 gears can provide you with a smoother riding experience than traditional 2-gear setups.
The 4GS drive gear position is fixed, so all the gears mesh perfectly. This keeps the gears healthy and reduces the chances of incorrectly setting them up.
During an efficiency test of the new 4GS, we were getting an average energy consumption as low as 10Wh/Km!（6384, 8-inch tire, rider weighted 75kg)
Shock Absorbing Hub Adapters:
The shock absorbing pad was specifically designed to reduce the impact from your hubs to the gears.
This also acts as a quick release for the hubs, making tire changes a breeze.
6 angular contact bearings to keep the gears spinning nicely along with one single sealing bearing on the casing to keep debris out.
Hard anodized surface:
All aluminum parts is hard-anodized which the top surface is more stronger and durable.
Motor gear install tips:
4GS test ride video:
Install video done by other youtubers:
Notice： stepped down shaft won't compatible with our pinions
Each gear drive includes:
55t POM gear/ 38t Pom gear *1
11t Motor gear (8mm with keyway, 10mm no keyway) *1