Quick Summary
The ZTZ 20 x 4.0 fat tire eBike air suspension front fork is a front fork for bikes that use a QR 9x135mm setup. It is described with 180 mm travel, a 28.6 mm / 1-1/8 inch thread-less straight steerer, a 34 mm inner tube, and a 74 mm disc brake type.
The fork is also described as a double crown suspension fork with air shock absorption and an adjustable air pressure value. If you are comparing offers, the key checks are wheel and axle setup, steerer size, brake type, and the exact bike model you plan to use it on.
Key Details
| Detail | Product information and buyer relevance |
|---|---|
| Brand | ZTZ, which identifies the product line. |
| Product type | Air suspension front fork for a fat tire eBike setup. |
| Travel | 180 mm, which affects fork movement and front-end height. |
| Steerer | 28.6 mm / 1-1/8 inch thread-less straight steerer, which must match the bike. |
| Axle setup | QR 9 x 135 mm, which is a key fit check for the front wheel and fork interface. |
| Inner tube | 34 mm inner tube. |
| Brake type | 74 mm disc brake type, which should match the brake setup. |
What to Compare Before Buying
- Axle and spacing: This fork uses QR 9 x 135 mm. Compare that with your wheel and front-end setup before ordering.
- Steerer size: The steerer is 28.6 mm / 1-1/8 inch thread-less straight. Check that your frame and headset are set up for that size.
- Brake type: The fork is listed with a 74 mm disc brake type. Confirm that your brake setup matches.
- Travel: The stated travel is 180 mm. Compare that with the front-end setup you want for the bike.
- Exact bike model: The description points buyers to check bike model and parameters carefully, so model matching matters before choosing this fork.
Compatibility, Size and Fit
This fork is positioned for 20 x 4.0 fat tire bikes and is described for use on a range of bike types, including electric bikes and folding bikes. The practical buying check is to confirm the exact wheel size, axle spacing, steerer size, and brake setup on your bike before choosing an offer.
The 20 x 4.0 size reference and the QR 9 x 135 mm setup are the main fit points. If either one does not match your bike, the fork is not the right choice.
What Else You May Need
Make sure your bike is set up for the stated steerer, axle spacing, and disc brake type. A compatible front wheel and brake setup are necessary for fit.
Before You Decide
Confirm the 20 x 4.0 size, QR 9 x 135 mm axle setup, 28.6 mm / 1-1/8 inch steerer, and 74 mm disc brake type before choosing this fork. The listed fit points are the main decision factors for this model.
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