Bicycle Mechanics - How do you determine fork length for 1" steerer diameter?

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Sincitycycler
03-09-08, 09:14 PM
I am in the process of bidding on an Italian frameset that comes with a 1" matching threadless fork. I prefer the look of a quill stem on a steel bike so I would like to install a 1" threaded fork instead.

How do Idetermine what length fork I need (it would be for a 61 cm Viner)?

Thanks for any help

FlatFender
03-09-08, 09:40 PM
length of head tube + stack height of headset
operator
03-09-08, 10:38 PM
http://i4.photobucket.com/albums/y115/reciprocity/stackheight.jpg

Add to length of head tube and away you go.

Autobus
03-09-08, 10:59 PM
http://i4.photobucket.com/albums/y115/reciprocity/stackheight.jpg

Add to length of head tube and away you go.

Wow! Good info-thanks

BTW, Who makes a good selection of 1" chrome threaded forks?
Autobus
03-09-08, 11:28 PM
I imagine it's hard to get a threaded fork to match your headtube + stack length of steerer tube exactly? Your LBS may have to cut the steerer tube?
jgedwa
03-10-08, 05:44 AM
Tange sells a couple of forks that could work. So does Surly.

Only two problems: super-long steerer tubes are hard to find, and all of the new ones for sale are cheapish and heavy.

Search for "fork" under cycling on Ebay and you will see tons of options.

jim
HillRider
03-10-08, 09:08 AM
Threaded forks used to come in a range of steerer lengths and you chose the closest one and either cut off the excess length or used some spacers under the locknut.

One reason for the almost complete take-over of threadless steerers/headsets was that they simplified manufacturer's inventory. Forks were all made with one extra long steerer length and cut to fit.