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Determining fork travel on unknown fork

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Determining fork travel on unknown fork

Old 05-23-18, 05:28 PM
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Determining fork travel on unknown fork

Hi everyone,
I want to use an old fork I have as a starting point to know which new fork to get for an ebay frame I bought. I don't know what the frame was intended for... 80mm, 100mm, or 120mm forks.

But, the old fork is a Rock Shox Dart 1 circa 2007 off my wife's 2007 Trek 4500 WSD. Seems to be either 80mm or 100mm but I can't tell for sure from web searching. It might be adjustable between 80/100 with an internal bumper installed or left out.

I measured from the top of the dust seal to the bottom of the fork crown, and that was 100mm. Can I assume it's a 100mm fork?

Or, if there is a bumper inside to make it only 80mm travel, would it sit like an 80mm fork or a 100mm fork?

I've used it on a hard-tail I'm building up, and the bike rides nose-down with this Dart fork. So I'm pretty sure I want a longer fork when I buy a good one, but I don't know where I'm coming from. (Besides the fact that the fork is shot and it's 1/2 way through its suspension all the time I'm riding it.)

I think I'm going to go for a rigid fork, so the length is pretty important. Any advice how to know what I'm currently using?
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Old 05-24-18, 05:11 AM
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That vintage Dart was probably 80mm. This Bikepedia page seems to indicate the same. https://www.bikepedia.com/QuickBike/...spx?item=95858
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