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High Grade Skinjob.
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Discussion Starter · #1 ·
...I just wanna know if it would be okay strengthwise?
 

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G'day Rick,

I think the manufacturer would be the best to ask about this, but for what it's worth, here is my lowly opinion.

The main concern with the front end of the 29er is that the head tubes are shorter and the axel to crown is longer, placing more leverage on the head tube when compared with a 26" bike.

120 is 20% more than 100 but I do not think the leverage is 20% greater for two reasons. Firstly, the fork is attached to a round rolling wheel, not wedged in the dirt and acting like a fulcrum on the fork and head tube. Secondly, the head angle will be slightly reduced, slightly reducing the leverage on the fork and head tube.

Also consider that a suspension fork can absorb the rough stuff where a rigid fork cops the lot and these Inbreds are built up rigid all the time. I'm about to do it myself.

The Inbred is a lump. Mine is 2700g, so there's no shortage of metal in there. There's also plenty of examples on the forum where people have put a 120mm fork on a bike made for 80 - 100mm to slacken it a little with success. Even my FS bike, Salsa Big Mama has had 120mm fork installed by members here who like the result.

Again, I'd ask OnOne about it, but can't see what the problem might be as long as your willing to accept the angle changes. The "sizing info" page on their web site shows all sorts of long fork on their bikes.

Good luck deciding.
 

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High Grade Skinjob.
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Discussion Starter · #3 ·
aye...that's basically what I figured.
Whatever happens, can't really afford anything new until something breaks....


all the best,
stan.
 

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4.0" fully suspended
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you'll definitely be good. I know someone who put a duc32 (117mm in 29er mode) and loved it on their inbred. I've got a spare duc32 lying around and probably will put it on my rigid scandal at some point.
 

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High Grade Skinjob.
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Discussion Starter · #5 ·
more good news. ta, doug!
 

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You should try to contact Brant or On One about it, see what they say
Brant doesn't work there now and On-one are bound to say no to cover themselves;I'm after real work experience :)
 

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Clink said:
Brant doesn't work there now and On-one are bound to say no to cover themselves;I'm after real work experience :)
Yeah, but he helped design it... He'd probably have a good opinion about it.
 

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I'm running 10mm on my ti29er inbred and it feels loads more stable than 80mm. Rumour is that they are working on a new ti and steel120mm capable 29er frame, should be good.
 

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I've upped the travel on a few bikes that weren't meant for it before and the biggest problem isn't frame stress as much as quirky steering. The bike will kind of act like it never wants to stay on-center with its steering so that whenever you weight the front, it'll want to turn left or right. The weird on-center might occur with your geometry, it might not, but I'd highly recommend using a very short stem if you go with a higher travel fork, it'll lessen the steering-weirdness effects a good deal, it's the only solution I know of.
 

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Rumour is that they are working on a new ti and steel120mm capable 29er frame, should be good.
I've been following the thread on their site which gives info. I'm just impatient; it will have to be the steel for me (cost) and i expect the Nimble 9 will come out first.
 

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i'm running 120mm on my one-one 29 Ti....it's been 6 moon allready.;)

i loves them,..it's feel like all mountain + xc capable,and used it as my racing bike,..SS it is.
when you're on board your bike,the fork compressed to 100mm-80mm...so no biggie.
coz i like it slacker,...
just make sure you run shorter stem tho(80mm)
 

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Sorry, if might help, not an Inbred, but I have a Raleigh XXIX Pro with a 120mm Thru 20mm axle Rockshox Reba Team and no problem so far after one year.
 

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High Grade Skinjob.
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Discussion Starter · #17 ·
ta fer replies.

what does brant mean when he says it'll fold the front end when you start hitting things hard....like snap off the headtube or sumpfink?

what kinds of things?
- trees?
- cliff faces?
- jumps with/w.out transitioned landings?

over to you, clink......
 

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liong71er said:
i'm running 120mm on my one-one 29 Ti....it's been 6 moon allready.;)

i loves them,..it's feel like all mountain + xc capable,and used it as my racing bike,..SS it is.
when you're on board your bike,the fork compressed to 100mm-80mm...so no biggie.
coz i like it slacker,...
just make sure you run shorter stem tho(80mm)
Hey Liong71er,

The Tinbred looks nice! I have 2 questions for you. First, what frame size do you have? Second, it looks like you have a 5mm extended crown race with your King headset. How much clearance is there between the downtube and the Fox fork knobs?

I ask because I just picked up a 16" Tinbred frame and am planning to use a Fox fork on it and am trying to decide on a headset.

Thanks,
Mark
 

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rickkane said:
what does brant mean when he says it'll fold the front end when you start hitting things hard....like snap off the headtube or sumpfink?
It was designed as an XC frame with a 100mm max fork.

If you ride it with an 120mm bolt through fork, like how a 120mm bolt through fork is meant to be ridden, you should be hitting things harder.

If you're not, you don't need an 120mm bolt through fork really.
 

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High Grade Skinjob.
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Discussion Starter · #20 ·
brant said:
It was designed as an XC frame with a 100mm max fork.

If you ride it with an 120mm bolt through fork, like how a 120mm bolt through fork is meant to be ridden, you should be hitting things harder.

If you're not, you don't need an 120mm bolt through fork really.
fair enough. after stumbling across an interview w/ you recently where ya made ref. to the fact that you didn't get into the design/building game to answer individual email requests, i didnae want to burden ya with further requests...so thanks fer chiming in.

my original question is based around the fact that as my confidence rises, i'm throwing my 200 lb. frame off bigger drops and jumps (eg. spending more time in the freeride park at glentress and hitting most things - some of the doubles i'm still working up to - on caddon bank at innerleithen, to give ya an example/reference point).

thus far, the reba (2007 w/ a DT 9mm skewer) is holding up well, though a bit more travel would be welcome. so, rather than wait for a british based company to get a cheap longer travel frame happening, i'm just wondering if i can stick a newer, longer fork on it without worrying about added risk of frame damage.

as with many/most people, i find i ask questions about my gear most when i ain't using it and with this snow and ice lingering, i have stayed on the road and am somewhat anxious to get back on dirt/mud.

so, brant, are the physical forces exerted on the on one inbred 29er by a 120mm fork something i should worry aboot?

(god, i'm boring myself with all this hypothetical mumbojumbo, so sorry to all who are still reading this thread...)
 
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