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Steerer tube length

Old 09-19-13, 10:45 PM
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lurch0038
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Steerer tube length

Hi everyone! I am interested in replacing my 64cm Surly LHT fork with something a little longer so I can extend the steerer tube to increase the handlebar height. I have safety concerns about attaching a steerer tube extender and was wondering if anyone could recommend a fork that is compatible with a LHT that will provide the same increased length as the extender would.

THANKS!
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Old 09-20-13, 02:05 PM
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Doug64
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Was your current LHT steerer tube cut?
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Old 09-20-13, 02:57 PM
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If yours was cut then could buy a new one uncut:

https://surlybikes.com/parts/forks/lo...l_trucker_fork
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Old 09-20-13, 06:18 PM
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I told my lbs that I would need a longer steerer tube than stock for road bike I was looking to buy. They said that for liability reasons, they could not comply, implying a safety issue. Would be a DIY project for me. They would assist.

Here is a long thread on the subject. Says a lot and says nothing. And none of this post addresses your question. Sorry.
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Old 09-20-13, 08:03 PM
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Originally Posted by lurch0038 View Post
Hi everyone! I am interested in replacing my 64cm Surly LHT fork with something a little longer so I can extend the steerer tube to increase the handlebar height. I have safety concerns about attaching a steerer tube extender and was wondering if anyone could recommend a fork that is compatible with a LHT that will provide the same increased length as the extender would.THANKS!
How much higher do you wish to extend the steering tube? I've seen several bikes using the extenders, none were on forks with CF steering tubes though.

Brad
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Old 09-20-13, 08:16 PM
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a good frame builder can make the fork to meet your needs ..

advantage .. these days the threadless steerer is not butted , so the tube just has to be 9/8" outside

you can get it stiffer than was standard by using a thicker wall ChroMoly tube .

If you got a carbon steerer fork. those apparently are needing minimal [leverage] distance
between top headset and stem..

Steel will be more forgiving,

Last edited by fietsbob; 11-01-13 at 10:04 AM.
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Old 09-20-13, 08:26 PM
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Do these look tall enough?

https://www.bigandtallbike.com/Forks_c_60.html
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Old 09-20-13, 10:16 PM
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Originally Posted by Shimagnolo View Post
What do you use for headset spacers? Pieces of PVC? wow
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Old 09-21-13, 06:42 AM
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lurch0038
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Great info and after all of my searching I did not see these sites. A big and tall bike shop...who knew...I think I will be spending a ton of money there!

My tube was uncut but after my measurements has ~4'' of height and that is not enough for me. It looks like the 26'' LHT disc trucker for has a steerer of 400mm while the 700cc has a steerer of 350. You would think that the bigger 64cm would get the longer steerer....seems odd.

Based upon the Surly sizes and the fork from the big and tall shop I can increase the height by an additional 4'' using the 450mm steerer tube. It looks like the new fork has a tire clearance of 35mm while the LHT has 45mm, will this be an issue?

Could I bring the fork to a local welding shop and ask them to increase the steerer? has anyone done this and if so what were the results?

steerer tube (450mm) - head tube (226mm) = (+-)124mm = 8.8''
Which should be enough.
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Old 11-01-13, 09:14 AM
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Handsome Cycles had some spare forks for their Devil back in May. They have 400mm steerer tubes and are almost identical to the LHT fork (700c). There might be a little difference in the crown-axle length but I don't think it's much....probably millimeters. The new Devils (and presumbably the new replacement forks) have 260mm steerer tubes. You might check to see if they still have some of the 400mm tube forks.
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Old 11-01-13, 09:28 AM
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What about using a stem with a steeper angle to increase the height?
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Old 11-01-13, 09:54 AM
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Some stems come with a large angle, have you looked at those yet? On a bike I built up a few months ago I used a 90mm stem with a 35 degree angle. The 35 degree angle gets the top of the handlebar roughly 2 inches above the top of my (31.8mm diameter) handlebar. A longer stem would raise it even more.

Just yesterday I was reading an article about sizing bikes for tall riders. This does not answer your question, but it might answer some questions that you did not realize you had yet.
https://velonews.competitor.com/2013/...-riders_306560

I would not take a fork to a welding shop that is not used to doing bicycle work, that is what custom frame builders are for.
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Old 11-01-13, 09:55 AM
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lurch0038
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To follow up with this. The standard uncut steerer tube length on the 64cm is amazingly the perfect length for me. However, I may consider adding an extender or actually bringing the fork to a machinist to lengthen the tube IF I want more room for a second stem.
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