Is Shimano Nexus 7 GOOD?
The Shimano seven-speed hub gear is superbly practical and fuss-free, with a wide enough range of gears that it’ll suit even fairly hilly terrain. Bolt-up hubs help deter thieves but you’ll have to carry a 15mm spanner, just in case.
How does Shimano Nexus 3 speed work?
Three speed hubs use a planetary gear system to achieve a gear ratio between the sprocket and the wheel. In this gear system the sun gear is fixed in place while the planet carier is rotated. This causes the planet gears to rotate which in turn causes the ring gear to rotate. The rider selects a speed using a shifter.
What is Shimano nexus7?
Shimano Nexus 7 Shimano’s super-reliable Nexus 7 hub offers all the low-maintenance reliability of the traditional 3-speed Sturmey Archer hub that your grandad used, but with a much wider range and smaller steps between the 7 gears, giving gearing equivalent to an 11-27 7-speed cassette.
What is a roller brake?
Rollerbrakes are cable-operated with metal braking surfaces that are then lubricated with bike grease. Set inside a cylindrical casing, the cam and rollers are fully covered. The cooling disc for the brakes — to reduce the chance of overheating — and the brake arm for the cable is kept outside of the casing.
Are 3-speed bikes good?
A 3-speed bike is a great option. It gives you more choices and more flexibility than a single-speed bicycle, but it doesn’t reach anywhere near the many options of seven, 21, or even higher-speed bikes. With a 3-speed bicycle, you can tackle riding uphill, downhill, and flat terrain.
Is Shimano Alfine better than Nexus?
The two main differences compared to Alfine 8 seem to be the exterior finish, which is better on the Alfine, and the braking options. Both can use rim brakes, Nexus 8 Premium can use roller brakes, while Alfine can use disc brakes. AFAIK the coaster brake Nexus hubs are/were the “ordinary” version with plain bearings.
What is a nexus hub?
Shimano Nexus is a brand of bicycle components which includes products such as epicyclical gear hubs, cranksets, shifters, brake levers, hub brakes, hub dynamos, and a CPU for automatically changing gears.
What are 7 speed bikes good for?
A 7-speed bike is a great bike for a person who rides on tricky terrain. It’s main purpose is to let the bike adapt to rough conditions and accommodate inclines, bumps and other difficulties. On a 7-speed bike, the lower gears make it easier to pedal and the higher gears allow for better movement going downhill.
How do Shimano Nexus roller brakes work?
A Rollerbrake has cylindrical rollers around a central, multi-faceted cam. The rollers press three brake shoes outward against the brake drum, to equalize the distribution of outward force to the brake shoes.