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Changing Front Fork. What is a Tapered Steerer Fork & a Straight Steerer Fork?

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Changing Front Fork. What is a Tapered Steerer Fork & a Straight Steerer Fork?

Old 02-16-14, 11:22 PM
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fodio
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Changing Front Fork. What is a Tapered Steerer Fork & a Straight Steerer Fork?

Hi Guys,

Need your advise in explaining what is a Tapered Steerer Fork and a Straight Steerer Fork?

Can a Tapered Steerer Fork fit a Straight Steerer Fork Headset or Headtube?

I am currently using a Straight Steerer Fork (RockShox J3), can I change and fit a Tapered Steerer Fork to my frame? Do I need a special adapter for it?

I am planning to buy and install a Tapered Steerer Fork but not sure if it fits my bike Frame, Headtube and Headset. Below is the link of the Front Fork I want to get:
http://www.hongfu-bikes.com/html_pro...-Fork-260.html

My current bike model is: 2006 - KHS Alite 3000:
http://khsbicycles.com/04_alite_3000_06.htm

Can anyone advise what are the specifications of my Bike Frame, Headtube and Headset. And do i need to change the Headset to fit the Tapered Steerer Fork from Hongfu Bikes?

Here are photos of my current bikes Headtube and Front Fork:
https://picasaweb.google.com/1019106...1226/FrontFork

Please advise, thanks much!
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Old 02-17-14, 12:58 AM
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You need a straight steerer fork
http://oldglorymtb.com/wp-content/up...eerer-tube.jpg
You can get an adapter to put a straight in a tapered but not the other way around. A tapered just flat out wont fit in the straight head tube.
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Old 02-17-14, 01:29 AM
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Originally Posted by fodio View Post
I am planning to buy and install a Tapered Steerer Fork but not sure if it fits my bike Frame, Headtube and Headset. Below is the link of the Front Fork I want to get:
http://www.hongfu-bikes.com/html_pro...-Fork-260.html

My current bike model is: 2006 - KHS Alite 3000:
http://khsbicycles.com/04_alite_3000_06.htm
1) You cant use a fork with a tapered 1.5" to 1 1/8" steering tube as already mentioned, you need a fork with a straight 1 1/8" steering tube.

2) The fork you linked is for a 29" bike, you have a 26" bike so you'll need a fork for a 26" bike.

3) To keep the geometry the same you'll need a 100mm suspension corrected rigid fork.

Something like a Surly 1x1 100mm suspension corrected fork is what you need.

http://surlybikes.com/parts/forks
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Old 02-17-14, 04:57 AM
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fodio
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Thank you on the info.

I am trying to find a Straight Steerer Carbon Fork with A-C at 470mm to keep the geometry the same at 100mm, for a corrected 100mm suspension fork, weighing at around 500 ~ 600 grams. Would you have any recommendation for such a Straight Steerer Carbon Fork?

Saw a website that says 29" Carbon Rigid Fork Straight Steerer, and the A-C at 470mm, and was wondering if can i still use it on my 26" bike?
Like this one:
http://www.shop-yishunbike.com/frame...-fork-ys-fmk03
or
http://www.ebay.com/itm/TRIGON-29er-...-/271346301664

Please advise!

Thanks.
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Old 02-17-14, 06:06 AM
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A 100mm 26" suspension fork might have about a 470mm axle to crown measurement when it's fully extended but when subtract 20 to 25% sag it will be closer to 450mm.

That's why a 26" 100mm suspension corrected rigid fork has about 450mm axle to crown and not 470mm.

20 to 25% sag is what's generally used on suspension forks, you don't ride them fully extended.
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Old 02-18-14, 10:27 AM
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Originally Posted by cobba View Post
. . . you don't ride them fully extended.
Well, some of us like to - - especially when we're in hoverbike mode . . . .


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