Rigid fork question for Monster

rthomer · January 27th, 2009, 8:20 PM

Hi all,

I have a 91 Monster and I'm looking for a rigid fork. I'm looking for a Yo type, not the original tange strut and I know my Monster wasn't designed for suspension.

The questions are:

1. Can a Yo fork work on Monster, is the length and rake the same for non suspension Fat frames?
2. How do I make sure I'm not buying a suspension corrected fork? What length fork is correct for my Monster.
3. What is the difference between a Big One inch and a Boi fork, if any?

I am presently looking at a few forks for sale thanks to responses to my search for a fork on this site, any input would be appreciated.

Thanks in advance, Robert

Butcher · January 28th, 2009, 12:41 AM

Your more than likely going to get the right non suspension corrected fork if you get a Yo Eddy fork since by the time Fat City was making suspension corrected frames Yo's were getting the BOI (Big One Inch - same thing) fork. You can tell the difference between a Yo Eddy fork and a BOI by measuring the diameter of the fork blades. 1 1/8" is a Yo Eddy Fork and 1" is the BOI. The BOI was made in both corrected and non-corrected versions and came on the scene with the 10th anniversary bike in 1992.

For reference I just measured the axle to crown on my 91 Monster with original Tange Struts fork and its 380mm. I seem to remember that the Monster Fat shared geometry with the Yo so the forks should be completely interchangable with predictable handling results.

Hope that helps.

rthomer · January 28th, 2009, 12:58 AM

Thanks Butcher. That really clears things up.
Robert

rthomer · January 28th, 2009, 11:28 PM

Thanks for your response to my question.
I did discover one thing in a 92 catalog. The Monster specs indicate that the fork rake is 1 3/4" vs.
1 1/2" for the YO. the geometry is similar, the wheel base on a Medium Monster is slightly longer, all other angles, seat and top tube lengths are the same.
The question is do you think there is an issue using a YO fork on the Monster, it's going to affect the handling some,,,or am I over thinking this whole thing??

Butcher · January 29th, 2009, 12:25 AM

I got your PM and replied there.

For anyone else looking at the thread I think the Yo fork would work well on your Monster.

January 27th, 2009, 8:20 PM	#1
rthomer Senior Member Join Date: October 14th, 2007 Location: Sierra Madre, CA Posts: 143	Rigid fork question for Monster Hi all, I have a 91 Monster and I'm looking for a rigid fork. I'm looking for a Yo type, not the original tange strut and I know my Monster wasn't designed for suspension. The questions are: 1. Can a Yo fork work on Monster, is the length and rake the same for non suspension Fat frames? 2. How do I make sure I'm not buying a suspension corrected fork? What length fork is correct for my Monster. 3. What is the difference between a Big One inch and a Boi fork, if any? I am presently looking at a few forks for sale thanks to responses to my search for a fork on this site, any input would be appreciated. Thanks in advance, Robert

January 28th, 2009, 12:41 AM	#2
Butcher Senior Member Join Date: July 12th, 2008 Location: Fort Collins, Colorado Posts: 136	Your more than likely going to get the right non suspension corrected fork if you get a Yo Eddy fork since by the time Fat City was making suspension corrected frames Yo's were getting the BOI (Big One Inch - same thing) fork. You can tell the difference between a Yo Eddy fork and a BOI by measuring the diameter of the fork blades. 1 1/8" is a Yo Eddy Fork and 1" is the BOI. The BOI was made in both corrected and non-corrected versions and came on the scene with the 10th anniversary bike in 1992. For reference I just measured the axle to crown on my 91 Monster with original Tange Struts fork and its 380mm. I seem to remember that the Monster Fat shared geometry with the Yo so the forks should be completely interchangable with predictable handling results. Hope that helps. __________________ Single track mind - Fat City

January 28th, 2009, 11:28 PM	#4
rthomer Senior Member Join Date: October 14th, 2007 Location: Sierra Madre, CA Posts: 143	Fork question again..... Thanks for your response to my question. I did discover one thing in a 92 catalog. The Monster specs indicate that the fork rake is 1 3/4" vs. 1 1/2" for the YO. the geometry is similar, the wheel base on a Medium Monster is slightly longer, all other angles, seat and top tube lengths are the same. The question is do you think there is an issue using a YO fork on the Monster, it's going to affect the handling some,,,or am I over thinking this whole thing??

January 29th, 2009, 12:25 AM	#5
Butcher Senior Member Join Date: July 12th, 2008 Location: Fort Collins, Colorado Posts: 136	I got your PM and replied there. For anyone else looking at the thread I think the Yo fork would work well on your Monster. __________________ Single track mind - Fat City

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January 28th, 2009, 12:58 AM	#3
rthomer Senior Member Join Date: October 14th, 2007 Location: Sierra Madre, CA Posts: 143	Thanks Butcher. That really clears things up. Robert

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