Fat Bike Suspension Fork

Bolton Ebikes
(14 reviews)
Current Stock:
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Will this fork fit my bike?

The best fork for Fat Ebikes!  This will fit the Sondors, Rover, and other Fat ebikes using a straight steerer tube and standard quick release axle.  Tires above 4.5" are not recommended as the fit can be very tight.  Fork is setup for 160mm rotors, please use a brake adapter for larger rotors.


* Please note that forks do not come with a starnut or headset assembly. If you need to purchase one, you can find that here: Replacement Headset

  • Designed for 135mm quick release.
  • 100mm travel
  • Lightweight Magnesium construction
  • Note - Current colors may vary from video.  Body of fork is black, fork tubes may be black or gold.
    • Steerer Tube Length:  8.75"
    • Tire Clearance:  4.75"
    • Dropout Width:  135mm
    • Crown to Axle Measurement:  18"
  • Steerer Tube Length:  8.75"
  • Tire Clearance:  4.75"
  • Dropout Width:  135mm
  • Crown to Axle Measurement:  19.5"
  • Steerer Tube Length:  8.75"
  • Tire Clearance:  4.75"
  • Dropout Width:  135mm
  • Crown to Axle Measurement:  20.25"

Recommended pressure per weight:

220   75-95
200   72-87
170   68-80
140   64-75
120   55-72
100   47-59
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  • 4
    Does not fit the Radrunner 1

    Posted by DA on Feb 26th 2023

    Nice looking fork high quality etc. but the 20" does not fit the Radrunner. I had a professional try and install it but no luck. All kinds of issues given the geometry of the Radrunner frame.

  • 5

    Posted by BT on Feb 26th 2023

    This fork is 3 1/2 pounds less then the rad Rover, better low-speed handling, excellent on big bumps, makes it feel like a whole new bike! Fits the Rover with no modification, the bike feels more nimble and alive! Went to lbs, had them removed the old crown race and put it on the new fork, had them install a new star nut, $20. Just a great improvement to the radrover!

  • 5
    Bolton fork for rad runner

    Posted by john rudzitis on Feb 26th 2023

    I upgraded my stock fixed fork with a Bolton suspension for on my Rad Runner. Not to tough to do if you are handy. Needed to provide spacers for mounting the brake caliper, transfer bearing race to new fork, discard steering stem spacer and add to kickstand because bike sits higher. Ride quality on dirt trails is much improved and worth the price.

  • 5
    Great upgrade

    Posted by Clifton Davis on Feb 26th 2023

    The low speed handling on my 2019 Rad Rover was not good. This fork is a huge improvement. I can ride hands free now at 11 mph

  • 5
    Excellent Upgrade!

    Posted by Dave Thomas on Feb 26th 2023

    I installed this fork on my Rover last week. It proved itself on the first 38 mile ride - the front suspension and handling feels so much better. It's about 3.5 pounds lighter that tbe original Rad fork, and the damping is way better. I'm hitting transitions into tunnels and onto bridges full speed - soaks those up really well where I used to get a hard impact. My wrists, elbows and shoulders feel so much better too. Great value at the price, pretty easy install.

  • 5

    Posted by Scott Osberg on Feb 26th 2023

    If you own a Radrover and like to get a lil air and do wheelies, these forks kick ass for the price. front end is so much lighter, nimbler. I only weigh 140 lbs I set air pressure to 60, almost perfect. 3-4 feet jumps they don't compress all the way and soaks it up nice. I realize these aren't for downhill, but for little jumps and rutty trails they work real nice.

  • 5
    Fit my RadRunner 1 with a few adjustments

    Posted by Joe P on Feb 26th 2023

    I had my bike shop hook it up and it worked like a charm with a few adjustments. - front brake cables were too short with the new fork so had to replace with longer - the rad fender will not mount to this fork so need to get a new one - kickstand now too short with the new fork so need to extend or replace - brakes need to be mounted on the rear of the fork - the rad neck riser is not necessary with this fork I love riding this thing. I loved it before but now its floating over bumps like a dream.

  • 5
    Fits and works well on Biria Electric Folding S2 ebike with 20” wheels.

    Posted by Mike Busch on Feb 26th 2023

    It smooths out small and intermediate bumps. It will not turn your folding bike into a true off road bike. Because of the 20” wheels the travel in the fork is limited. It does absorb jolting shocks to hands and shoulders. My daily rides are much more enjoyable with this fork. FYI there are not attachments points for a full front fender. There is a single attachment point for a stubby front fender. I will order a second fork for my wife. . . So you know it must be good.

  • 5
    Fit Radrunner1 no problem

    Posted by L. Vargas on Feb 26th 2023

    Fits easily, the factory fork there is a crown that you need to take off, and put on the Bolton fork. After installing it in the neck, the factory spacer will not work on the fork, just put on the Radrunner stem, tighten it up. Star nut i pounded in using a 3/8 extension flared end down. Cake