Lightest mountainbike rigid fork

Discuss light weight issues concerning mountain bikes & parts.

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Fatbiker
Posts: 874
Joined: Tue Aug 08, 2006 1:41 pm

by Fatbiker

What is the lightest mountainbike rigid fork with boost spacing?

Everything I have found so far is in the region of 700 grams. Seeing as gravel forks with internal routing are being built in the 400 grams region, 700 grams just seems a lot.

by Weenie


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fatpinarellorider
Posts: 254
Joined: Wed Mar 01, 2023 5:30 am

by fatpinarellorider

I wouldn't know, but it seems you sorta prioritised the newer wider (and heavier) hub standard over and above weightweenism here... :|

:noidea:

Upcountry
Posts: 184
Joined: Mon Aug 07, 2023 10:59 pm

by Upcountry

fatpinarellorider wrote:
Fri Dec 15, 2023 12:32 pm
I wouldn't know, but it seems you sorta prioritised the newer wider (and heavier) hub standard over and above weightweenism here... :|
This is fake news... You're talking 3g-10g difference from any of the big manufacturers between a 12/15x100mm and a 15x110mm hub...

I sort of paid attention to weight when looking for rigid fork for my Epic build... I ended up with an SP Cycles, as it was the shortest axle-to-crown I could find and it weighed 625g. Curve Cycling out of AU also has a similar weight(615g stated) 480mm a/c boost fork that is probably as light as you'll fnd...

jemima
Posts: 272
Joined: Fri Apr 22, 2011 12:36 am
Location: Perth

by jemima

Orbea Spirit fork 480mm atc mentions 575gm.
Curve Grovel ti.

zscs
Posts: 142
Joined: Thu Jul 26, 2018 12:05 pm
Location: Hungary

by zscs

My old Niner QR15 15x100mm fork was 646g with uncut steerer tube.
Image

Changed the RS QR15 axle to a Maxle Stealth one (70g -> 37g), cutting the steerer to ~18cm the weight went down to ~595g.

FYI: I'm using the superlight Trickstuff Deckele as a 'star nut' (14 grams only) with it. ;) Almost 6 years of using for training and also for racing, so if not only gram shredding but also reliability is important to you, I have good news for you regarding Niner forks. :) https://www.strava.com/activities/9542617529
Image

Fatbiker
Posts: 874
Joined: Tue Aug 08, 2006 1:41 pm

by Fatbiker

I really like the Niner. Unfortunately the current boost fork only sells with the cargo cage bolts.

The Orbea Spirit fork is new to me. It looks very nice! Thanks for the tip. I think it would look very nice with the frame I have - a Radon Jealous. I wonder if the weight claim checks out.

zscs
Posts: 142
Joined: Thu Jul 26, 2018 12:05 pm
Location: Hungary

by zscs

There's a relatively new rigid fork on the market by Scott: https://www.scott-sports.com/global/en/ ... rigid-fork
It's quite light and looks durable, also can fit for long bikepacking rides. But I haven't found any info about the headset compatibility. Based on the photo, this is formed to one specific lower headset bearing? :noidea:

Image
Looks like compatible with 45°/45°bearings. Maybe with the stock MY 2022-2023 Scott Scale's Acros headset. I haven't found any info on this.

by Weenie


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jfranci3
Posts: 1605
Joined: Tue Jul 26, 2016 5:21 pm

by jfranci3

700gr sound about right. The difference between a gravel fork and a MTB one would be the cat 2 vs cat 3 testing cycle - 15cm drops vs 60cm drops

Keep in mind if you're shopping here the Axle to Crown. If it's significantly different than the suspenison fork, your HT angle goes way off.

One strategy that might work would be a gravel fork + external lower headset.
https://bikepacking.com/index/forks-wit ... e-mounts/3
https://www.laufcycles.com/product/jaf-2nd-gen
https://ritcheylogic.com/bike/forks/wcs ... ravel-fork

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