Suspension Forks to Rigid conversion! Fork Length Advice!

[bernieUK]

I am contemplating swapping my Rockshox Recon Gold Solo Air 100mm forks over to a rigid carbon fork mainly to save weight plus I will very unlikely get full use from suspension forks. I use the bike mainly on fairly smooth paths and never off road.

I am a little confused about measuring my Rockshox forks. Should I be measuring from where the crown race is installed at the bottom of the steerer tube & down to the axle (490mm) or should it be from the top of legs down to the axle (460mm). I hope that make sense!

I have seen a couple of White Brothers Rigid Forks on sale at very good prices. The two lengths are 425mm and 445mm. I am assuming the longer length would be better. Also do I need make any allowance for my Rockshox 100mm travel?

Any help or advice would certainly be appreciated.

 

[RecordAceFromNew]

I am contemplating swapping my Rockshox Recon Gold Solo Air 100mm forks over to a rigid carbon fork mainly to save weight plus I will very unlikely get full use from suspension forks. I use the bike mainly on fairly smooth paths and never off road.

I am a little confused about measuring my Rockshox forks. Should I be measuring from where the crown race is installed at the bottom of the steerer tube & down to the axle (490mm) or should it be from the top of legs down to the axle (460mm). I hope that make sense!

I have seen a couple of White Brothers Rigid Forks on sale at very good prices. The two lengths are 425mm and 445mm. I am assuming the longer length would be better. Also do I need make any allowance for my Rockshox 100mm travel?

Any help or advice would certainly be appreciated.

A2C is generally used and is the distance from the crown race (C) at the bottom of the steerer tube to the centre of the axle (A). To retain geometry you would need to measure the suspension forks' A2C while it is fully extended and then subtract sag, which is typically c25% of travel. Rigid forks which are longer than such will make the steering more sluggish/stable, and shorter more fidgety/responsive, since they affect headtube angle, and assuming the forks have the same offset (since offset and headtube angle both affect trail).

 

[bernieUK]

Thank you. Much appreciated.