ZTZ — Bike Forks & More

ZTZ focuses on practical bike components for riders who upgrade their own bikes: air suspension forks, wheelsets, hydraulic disc brakes, cranksets, cassettes and pedals. Every product is described by the standards that decide fit — wheel size, steerer, axle, hub spacing, hose length — so you can check it against your bike before ordering. Owners most often fit ZTZ parts to replace tired stock forks and brakes on hardtails, budget builds and fat-tire eBikes, and the range is aimed squarely at that kind of everyday trail and commuting use rather than heavy downhill racing.

We would rather show you the specification than make a promise. Our air forks let you set the spring to your own weight and add rebound adjustment and a lockout, where many entry-level forks are coil-sprung and fixed. The dual-air fork splits positive and negative chambers for finer tuning, the hydraulic brakes arrive pre-bled with adapters, and the wheelsets use a tool-free freehub that is easy to clean. Each part comes with the details you need to judge fit, which takes most of the guesswork out of an upgrade.

Start with your bike, not the part. For a fork, match the wheel size (26, 27.5, 29 in, or 20/26 in x 4.0 for fat tires), the steerer (our forks use a 1-1/8 in straight steerer), the axle and hub spacing (9x100mm for standard MTB, 9x135mm for fat bikes) and the brake type — ZTZ suspension forks are disc-only. For wheels, check hub spacing and cassette speed; for brakes, check hose length, rotor size and which lever sits on which side; for a crankset, check your bottom bracket shell (68–73mm). If you are unsure about cutting a steerer, bleeding brakes or torque settings, a professional bike mechanic is the safest route.

Yes — warranty and return terms come with every order, and they are set out on each product's page in the official store, where you can read them before you buy. Terms can differ from one item to another, so check the listing for the exact part you want. Keep your order number and some photos of the part as installed, because those make any warranty or return request faster to sort out. Damage from crashes, modification, improper installation or a compatibility mismatch is usually not covered, which is one more reason to confirm fit first.

We do not make environmental certification claims. What we can say is practical: our forks are aluminum and magnesium alloy, they can be stripped and rebuilt instead of thrown away, the wheel freehubs come off without tools for cleaning, and the pedals and bottom brackets use sealed bearings. Looking after a part — cleaning, servicing and replacing only what wears — keeps a good bike on the road longer, and that is the most sustainable upgrade there is.

Check four things. Wheel size: the MTB forks fit 26, 27.5 or 29 in wheels and the fat-tire fork fits 20 or 26 in wheels on 4.0 in tires. Steerer: ZTZ forks use a 1-1/8 in (28.6mm) threadless straight steerer, so a frame with a tapered head tube needs the right headset. Axle: 9x100mm quick release for the MTB forks, 9x135mm for the fat-tire fork. Brakes: the forks are disc-only, with no V-brake bosses. If all four match your bike, the fork will bolt in; the steerer is then cut to length for your headset and stem.

A single-air fork uses one chamber to set how firm the spring feels. A dual-air fork, like our 120mm Dual Air Suspension Fork, has separate positive and negative chambers that you pump independently. That gives finer control over how readily the fork starts to move on small bumps versus how it holds up under big hits, so you can match it more closely to your weight and riding style. If you like to tinker with setup, choose dual-air; if you want simple, choose single-air with rebound adjustment.

On our eBike hydraulic brake set, each lever has a sensor that signals the controller the moment you pull it, and the controller cuts motor output so the brakes are not fighting the motor. The sensors connect with 2-pin waterproof plugs, so check that your eBike controller uses the same connector before ordering. The set also includes 160mm rotors and comes with a 950mm front and 1880mm rear hose.