How do I know what length steerer I need?

[Reardy Mister]

Buying some forks for my old Kona but dont really know how much steerer length I need, because I'm mechanical numpty. I want to run an aheadset set-up, so i know I will need an extra 1.5" or so(?) more.

Any tips on getting this measurement?

[Rolls]

Its going to depend on how many spacers you want to run (and hence how high you want the bars, assuming you'll go for a standard-ish stem)
IMO, go for one thats too long if poss - you can always cut it down remember

[Reardy Mister]

Rolls said:

Its going to depend on how many spacers you want to run (and hence how high you want the bars, assuming you'll go for a standard-ish stem)
IMO, go for one thats too long if poss - you can always cut it down remember

Yes, but how do I know how long I need?! What do I measure and how?

[Rolls]

Meansure the lenght of the steerer tube on the frame (including the headset of course), and then add on the height of the stem - that would be the absolute minimum you'd want mate!