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26 inch wheel in a 700c front fork

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26 inch wheel in a 700c front fork

Old 03-06-18, 12:40 AM
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BwanaT
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26 inch wheel in a 700c front fork

I want to change my front rigid fork to a Suspension Fork with IS brake mounts.
The bike has 26" wheels. Will they work in the new fork?
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Old 03-06-18, 12:53 AM
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Leisesturm
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Are there no 26" suspension forks with IS brake mounts? I can't imagine that there are not any. Both forks will be 100mm wide at the axle. The wheel will 'fit'. The new fork 'may' fit the frame assuming a whole lot of things match up. But some things will not. Trail will be different from design spec. It will probably look funky and IMO aesthetics matter. I wouldn't do it. I hope I am not wasting valuable time on a troll. Good night.
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Old 03-06-18, 01:17 AM
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cobba
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Why not get a 26" fork?

Why do you need IS brake mounts, is the brake IS or PM?
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Old 03-06-18, 09:47 AM
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sch
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Can't quibble with the prior answers, but note that a number of gravel bikes make a virtue
out of their ability to use 650b or 700c wheels, rider option, with the 650b having greater
clearance at their shorter radius allowing larger tires for gnarlier rides. 26" will work ok
in the 700c forks.
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Old 03-06-18, 10:35 AM
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BwanaT
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Originally Posted by cobba View Post
Why not get a 26" fork?

Why do you need IS brake mounts, is the brake IS or PM?
Because the brake caliper is IS and half decent forks for a tourer in 26" are far and few between.
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Old 03-06-18, 12:00 PM
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Thank you all for your responses. I will wait for the bike and order the closest I can get.
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Old 03-06-18, 05:49 PM
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Originally Posted by BwanaT View Post
Because the brake caliper is IS
Some IS calipers can be attached to some PM forks.

A few photos of IS calipers on PM forks
https://ep1.pinkbike.org/p4pb10706113/p4pb10706113.jpg
https://ep1.pinkbike.org/p5pb10706129/p5pb10706129.jpg
https://ep1.pinkbike.org/p4pb10706356/p4pb10706356.jpg

The adapters won't fit on all post mounts and some IS brakes can't be attached to some adapters.
Sometimes you have to increase the rotor size when the caliper is attached this way.

Last edited by cobba; 03-06-18 at 05:55 PM.
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Old 03-11-18, 08:54 PM
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Thanks again for your responses. I have ordered one with Post Mounts and will change the caliper if I have to.
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Old 03-12-18, 05:40 AM
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Originally Posted by BwanaT View Post
I have ordered one with Post Mounts and will change the caliper if I have to.
What fork and what IS mount brake do you have?

I might be able to tell you if you can mount the brake and what you'll need to do it.
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Old 03-12-18, 11:15 AM
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Thanks cobba. I am changing the rigid fork on a new eBike to a Suntour Epixon PM 100mm air shock with PM. If I run into difficulties I will post here,
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Old 03-12-18, 05:05 PM
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Any IS mount brake will be vastly improved by swapping to a newer post mount caliper & lever.
You're better off buying new calipers than wasting money on adapters.
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Old 03-13-18, 06:44 AM
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Originally Posted by BwanaT View Post
a Suntour Epixon
This adapter should fit in that fork.

https://clee-cycles.co.uk/P1043/product

Most IS brakes would fit on it but there is some models that won't.
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Old 03-13-18, 09:55 AM
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Great, cobba and gsa103 Will let you know what transpires.Thanks
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Old 03-18-18, 07:35 PM
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Biktrix Stunner Ebike arrived and has a PM caliper with an IS adapter to the rigid fork. Since the fork is going to be replaced with the Sprung PM fork the caliper problem is no longer one.
Thanks again all for your help
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Old 03-19-18, 01:56 PM
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650B wheel installations in 700c bikes gets done more, these days, .. less BB clearance loss..
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