[ricer]

I am going to order a Planet X Superlight fork. The thing is I don't know whether or not to order the 400 or 425 version. In what instance would I use each? Thanks.

 

[WTB-rider]

I believe the 400mm is not corrected for suspension and will quicken the handling. 425mm is suspension corrected and will handle a touch slower . The 425 will be easier to mount
a 29" front wheel if the mood strikes down the road although it can be done with the 400(this is the model I have and I run a 29" front wheel) as well.

 

[JayPee]

It depends on how long of a travel suspension fork your frame was designed for. If I remember correctly, the 425mm is designed to replace 100mm+ travel forks.

 

[shiggy]

It depends on how long of a travel suspension fork your frame was designed for. If I remember correctly, the 425mm is designed to replace 100mm+ travel forks.

425 is usually for 80mm forks

 

[brant]

I believe the 400mm is not corrected for suspension and will quicken the handling. 425mm is suspension corrected and will handle a touch slower . The 425 will be easier to mount
a 29" front wheel if the mood strikes down the road although it can be done with the 400(this is the model I have and I run a 29" front wheel) as well.

I have very little clearance between the top of my Conti 2.5in x 26in tyre and the crown, with my 400mm fork... I can't imagine any 29in tyre fitting in there. A 700c one, yes, but not a mtb-sized 29er...

The planet x fork is the same fork as the on-one superlight, which we're stocking shortly in a 440mm length - more like a 100mm compressed suspension fork (at ride height).

The 420mm one (it's not 425mm), is closer to an 80mm suspension fork.

The 400mm one is a non suspension corrected chunky fork that's largely designed for trials riders.

 

[WTB-rider]

I have very little clearance between the top of my Conti 2.5in x 26in tyre and the crown, with my 400mm fork... I can't imagine any 29in tyre fitting in there. A 700c one, yes, but not a mtb-sized 29er...

The planet x fork is the same fork as the on-one superlight, which we're stocking shortly in a 440mm length - more like a 100mm compressed suspension fork (at ride height).

The 420mm one (it's not 425mm), is closer to an 80mm suspension fork.

The 400mm one is a non suspension corrected chunky fork that's largely designed for trials riders.

Wadda you callin' me a liar????

I ordered my Superlight last year and specified the 400mm for 2 reasons:

1. I wanted a non-corrected fork.
2. I'm a fat [email protected] and wanted a strong fork.

That said, I'm running a 29 X 2.3 Exiwolf on a Delgado rim in there but honestly never measured the axle to crown height. After reading your post I went out with a tape and lo and freakin' behold, it's 420mm!!!!
That's why you get the big bucks Brant