Explanation of steerer tube sises and the correct fitting.

STEERER TUBES - SPECIAL TUBES - CROWNS

STEERER TUBE DIMENSIONS

These dimensions are given as a figure that is based on the tubes diameter, length and the length of the thread.

Example: 28.6x260x0 = A tube that is 28.6mm (1 1/8") in diameter, 260mm (10") long and with no thread (Ahead).

NOTE: 25.4mm (1") tubes will require the addition of an extra bushing to enable fitting to the crown.
Part number: M5FKZ-2141-000.

NOTE: Threads can only be used on tubes made from cro-moly steel.
Aluminum tubes are only available in 28.6x260x0.
DUAL CROWN FORKS have a special type of tube, please refer to the parts list for each fork. 

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Some of our forks use a special type of steerer tube, the varius types and part numbers are listed here:
Cro-Moly tube for 281XL ????????
7075 Aluminum tube for Alfalfa TL / EL> ????????
Alloy tube for double crown forks. ????????
Special heavy duty tube for single crown forks - Like Alfalfa TL. ???????
 

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STEPPED CROWNS

We offer a replacement upper crown to be used on dual crown forks when fitting to a bike that has either a smaller or larger head tube than can be covered by the standard type.

 
They are available to fit the following models:
461 / 381 / 281 DH M5FAL-2382-000
GAMMA / 381 XL M5FC52382-000
HI-5 / HI-5TL M5FAF-2382-000
DELTA XL M5FB7-2382-000
NOTE: Do not position the lower crown any lower on the stanchion tubes than is indicated by the stickers, by doing this you could cause the front tire to make contact with the crown which could cause damage or personal injury.

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