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Suspension Front Fat Bike Fork (for Sondors and other Fat Ebikes)

Calculated at checkout

Product Description

  • Suspension fork designed for fat bike tires
  • Designed for quick release axles and bolt on axles,
  • Will not work with through-hole axles (15mm and 20mm)
  • Easy bolt on to the Sondors or other fat bikes
  • Accommodates tires up to 5 inches wide (Depends on the rim width)
  • Amazing affordable price
  • 4 inches of travel
  • Spring loaded so no issues for winter rides like the Bluto air fork has
  • Adjustments for preload and dampening (rebound)
  • Fork Steerer Tube width 1 1/8", length 8 1/4"
  • You will need a new 1 1/8" crown race as the one from the Sondors ebike is not removable
  • see images for dimensional drawing


Here is a nice review of our fork done by Karl at the Electricbike-blog

Crown race can be hard to remove to remove especially if it’s old, good thing they are cheap and available at your local bike shop or at:

1 1/8" Crown race can be easily bought here at JensonUSA or Chain Reaction

Installation can be done with basic tools or even a simple pipe and hammer like Karl did.

For ideas about how to install one, here is an example on how to intall one:
Crown race installation youtube video

Initial use: It may be necessary to add several complete turns of the preload, left-side, knob to give the internal spring enough pressure to return the fork to the top after compression.

Product Reviews

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  1. mongoose dolomite perfect fit!

    Posted by charlie nurse on Jan 20th 2017

    price is awsome fork is good! this is the perfect fork for the mongoose/sondors mainly for the price...but if you are riding a 200$ bike why would you spend twice as much for a fork? it does the job pretty well for 90.00$

  2. Adjustments?

    Posted by Unknown on Jan 13th 2017

    I had the fork installed at a bike shop. There was no info on how to adjust the forks. The shop gave me some basic info, however, since I did not buy it from them, they gave me limited info. I am a big guy and tightened down on the spring. My first ride on my Sondors Original Fatty was on trails through the desert. I bottomed out a few times, but it was much more comfortable than with the solid fork. YouTube searches had basic info on fork adjustment, but Luna should provide something. It will be much better when I learn how to adjust it.

  3. Great forks

    Posted by Unknown on Jan 12th 2017

    Great inexpensive option for fat forks, haven't put many mile on them yet. These with a suspension seatpost on a fat bike is more than enough suspension.

  4. Great option for those with fat bikes with 1 1/8 " non tapered head tube and hubs that fit 135mm fork spacing.

    Posted by ian on Oct 7th 2016

    I bought these forks but had not installed them as my front hub was for 150mm spaced forks. In general fat bike forks are either 135mm and 150mm over the lock nut (OLD) spacing. Please make sure you have 135mm hub as this is what these forks are. If you have 150mm you can pull apart the drop outs to fit on the 150mm hub but the shocks will not work. Anyway, I finally got a front hub that will accept these forks and for the price these forks are well worth it. Compared to my other forks (non suspension) the ride is way more smoother. If you have fat bike with 1 1/8" straight headtube and want suspension forks there are not many options and this is one of the very few options.

  5. Just installed new Fork

    Posted by Scott Machler on Sep 22nd 2016

    Just installed the fork today on a 2015 Boris X9 fat bike. Was the exact same size as before I took off so it fit on perfectly. Ordered an integrated bearing race online so I didn't have to try to get the old one off made installation simple. Will add to review once I get to test he suspension the bike is set up with studded tires for the winter.
    Scott M

  6. Defective forks

    Posted by Tim Starn on Aug 27th 2016

    The bottom of the forks where the axle is attached was not welded onto the fork tubes correctly and caused the shocks to bind when depressed due to them being twisted. Luna was excellent in replacing them. However, the second set had the same problem. I took the second set to a machine shop, where they were repaired. Excellent customer service but not a very good product.

  7. Nice fork for little money

    Posted by Steve Doty on May 30th 2016

    Much needed upgrade after the lcd display,controller,and 52 volt battery making bike much faster does a good job of soaking up the small bumps, i have built many electric fat bikes and have used similar forks off fleabay but paid more while not a Bluto or rst renegade they are a upgrade from solid forks and make bike look better also can't go wrong on price either, now on to hydraulic brakes

  8. Good Fork, ok service

    Posted by JAMES LEWIS on May 27th 2016

    After putting some miles in on the fork and a bunch of adjusting, I've decided it is a solid fork at a reasonable price.

    A few negative points:
    There was a noticeable sized scuff on the fork when it arrived. [no place to upload customer photos]
    No instruction of how preload works or dampening settings [ok? no.]
    Star nut included but not pre-installed [boo!]
    Shipping wasn't quite timely or quick enough or from the provider I chose in checkout. Zero communication from a complaint about this

  9. Great price!

    Posted by Mitchell Greene on May 10th 2016

    The fork works wonderful for the price point! The lock-out knob on my unit is not the anodized red like photo (blue plastic), but it works as expected.

  10. Fits perfect

    Posted by Richard on Apr 29th 2016

    For fits perfectly .....very happy....when reserved forks....were very didn t care for the price

  11. It fits the Sondors perfectly and improves the ride.

    Posted by Unknown on Feb 25th 2016

    The front fork fits perfectly and gives a better riding experience, particurly on rough streets or off road.