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Maybe a numpty question...BUT
Your advice needed.
Lots of second hand forks out there and lots of different steerer lengths.
How do you work out what you need?
Regards
Rich
Head tube length
+ headset lower stack
+ headset upper stack
+ stem clamp height
+ allow some height for spacers to allow you to fine tune - eg 15-20mm.
Steerer should be set up about 3mm below the top of the stem clamp or you can put a spacer on top of the stem if needed.
Or... assuming you already have some forks measure them. You need the same or longer.
You'll find 90% will be too short 😉
Thanks for the replies.
But what I am keen to understand better is the theory about the steerer length.
Is it about Bike frame size? type of riding? riders height?
I have a frame but no fork and need to determine how I should choose the right fork to fit?
Hope this makes sense sorry for basic terminology here.
Regards
Richard
well some freakishly tall people will need lots of spacers below their stem but most larger frames will have a slightly longer head tube than the smaller ones which accounts for the larger rider. If unsure then use the minimum measurement given above and add another 40-60mm. But that will really cut down your choice of fork to almost brand new only.
Most mountain bikes will be set up with about 15-20mm of spacers below the stem and then you sort the rest with angle on the stem and riser bars etc.
If racing XC you often want as low as possible with few spacers, 0 deg rise stem and flat bars. Downhill you normally want the oposite - rise on the stem and riser bars to get your body more upright and weight back.
200mm is the minimum I would cut a steerer for resale as it is good length for most people, frames and headsets.
Thats really helpful thanks