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700c Thorn Disc Steel Fork - Matt Black Powder

£135.00 Please note this product has selling restrictions to your country. was
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SJS Cycles part number : 
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Product Reviews (0)
Questions & Answers (5) Q & A
Our Thorn 700c Reynolds 525 Steel Disc Forks have an ISO disc mount, direct fitting stainless mudguard bosses, stainless open brake line guide and stainless bosses for lo-loader carriers. The L1 dimension (centre of axle to crown race seat) is 383mm. They're suitable for use with mudguards, using tyres up to 40c and they're available in 46mm or 52mm fork offset in 5 different colours. They have a high quality cast fork crown and weigh 1255g with the 380mm steerer (the steerer may be cut down to suit, which also reduces the weight by 1.03g per mm).

They've been designed to fit our Rohloff equipped Thorn Mercury and/or our derailleur equipped Thorn Club Tour MK4 but they'll also be suitable to retrofit to many non-Thorn frames - check the required L1 and offset.

- Steerer: 1 1/8"
- Offset: Choice of 46 or 52 mm
- L1 (Axle to Crown): 383 mm

- For sealed and unsealed solo road touring use only
- NOT suitable for stunts, jumps or serious off road use and abuse
- Max. Rotor Size: 183 mm
- Max. Load: 5 kg per side
- Max. Rider Weight: 130 kg
- Check carrier mounting carefully (especially if not using Thorn MK5 Lo-Loaders)
- Lower carrier mounts need spacers to clear rotor
- NOTE: ISO disc mounts may require facing
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Questions & Answers (5)
Hi, does the fork come equipped with a Star nut ? Regards, P.
10 Apr 2019
Thank you for your enquiry, this fork is not supplied with the star nut so this will need to be purchased as well. You could use our part number 30331 which is made by Cane Creek.
Regards. 11/04/19
Is the crown race fitted?
17 Jan 2019
No crown race is fitted as this is specific to the headset used.

Thanks - 18/01/19
Max tyre width for 650B (27.5) rim
25 Sep 2018

could you please tell what is the largest tyre of "27.5" type or xx-584 that could fit inside this fork

Hi, max size 47mm. Thanks
Are these disc forks available with 1" steerer tubes?
02 Aug 2018
I'm a recent convert to disc brakes after the purchase of custom built disc brake specific frame. I would like to fit a steel front disc fork to some of my idle traditional steel Audax and touring bikes which all have 1" fork steerer tubes. I'd be happy to have the braking and safety advantage of a front disc brake, at least, after what I've experienced with my new disc bike.
Hi there,

Simply, no. Most 1" forks are not produced with disc mounts as the two technologies do not really overlap on a timeline. Disc brake use has typically always been with 1/1/8th steerer tubes or even tapered.

Can You Confirm The Axle-Crown Length Of This Fork? 283Mm Sounds Short.
06 Jul 2016
I'm looking for a fork that will fit a 700x32 tire without a fender

This is a miss print on our part, the axle to crown measurement should actually read 383mm. This fork will happily accept a 700x32mm tyre if you are not running guards.