MTB Forks

[t121anf]

are forks generally the same size?

i'm watching a fork that has come off a new 20" halfords bike, i believe its this one

https://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_518205_langId_-1_categoryId_165499

I'm not 100% sure on my frame size but I think its 21", at work so can't measure.

would a fork from a 20" bike fit a 21"?

[Wafer_Thin_Ham]

Depends on the size of the steering stem. I don' have a clue if they are all the same size to be honest.
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[Student]

From my experience it doesn't matter what size the frame is, the steering tube is a universal thickness (I believe) and they just have extended length which is then cut down to fit the bike, the difficulty if you've got some forks off a smaller frame is the length of the steering tube, but generally just below the stem you'll have some washers, so if you really want the forks you can pull out some washers to make them fit...

Also depends on the style of headset/stem you have (If you look at a bike costing over £200 you'll notice the bit joining the handle bars to the forks is different to that on a £75 bike..)

But in general, the size problems can be solved.. Just depends on your current set up
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[t121anf]

both forks are el cheapo Suntour ones, however the ones i am looking at are the 2010 version with lockout, otherwise i wouldn't bother.

both bikes use a 26inch wheel so that suggested the lower fork length should be the same, and i presume disk mounts are universal.

fingers crossed the go cheap enough no to care if they fit or not

[arry]

Disc mounts are universal, yes


Forks - I think they're not all the same length - fairly sure as long as you get XC (Cross Country) forks and not DH (Downhill) forks you'll be alright as far as length is concerned.

[t121anf]

mine are


SR-XCM-V2 according to an archived evans cycles link

the ones i am watching are

Suntour XCM-V2 forks, 100mm of travel and lock out

according to halfords.

identical imo bar lockout

[nowhere.elysium]

[cagiva gezzer]

1) You need the correct steerer length. You can cut down long ones and/or add spacers but you can't make it longer.

2) Correct headset diameter. Things are changing but 1" or 1&1/8". Possibly more?

3) Threaded or A-Head headset style.

4) Disk mount or V's. Then as above, various types of disk mounts. . .
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[EuropeanNC30R...]

Cagiva gezzer summed it up. They might fit, a picture of your bike/frame and some details (such as age), might help to tell.

If it's all for a lockout though I wouldn't bother, it's massively overrated.

[t121anf]

bike its been removed from

https://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_518205_langId_-1_categoryId_165499#

bike its for

https://www.evanscycles.com/products/ridgeback/mx5-2009-mountain-bike-ec017042

only bothered as its cheap

[EuropeanNC30R...]

Going off the photos the head tube doesn't look unusually long on the Ridgeback, and the Carrera has quite a few spacers above the head tube, so for steerer length you could be ok. You have to be careful judging it by photos though - they don't photo every size so it could be 17" frames we're looking at.

On the other items cagiva gezzer mentioned you are ok, both are aheadset, both use same brake mounts, fork is identical.

Usually when selling forks the seller should state the steerer length so that you can check whether they are long enough.

[t121anf]

just been to look at a bike (mx5 2010 model) that has the fork I am watching and I don't think it'll work.

the new fork has the caliper radial mounted where as my bike is old school mounted.

will double check but it's not looking good