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Home made Fat Bike?
 

[Closed] Home made Fat Bike?

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[#5967679]

Been thinking of doing a cut & shut on my old Prince Albert Frame & set of rigid 29er forks, with all the other bits of junk I can't be arsed to flog was thinking I could eek out a Rat Fat Bike with just a set of wheels & tyres needed for the shopping list. Anyone done similar / can think of pitfalls or reasons not to?


 
Posted : 17/02/2014 1:40 pm
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cynic-al cut and shut a fat Marin bouncer.


 
Posted : 17/02/2014 1:45 pm
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Some one did it with an on one, I did it with a Marin FS and am planning a 2nd.

Will your forks have clearance? Std 29er ones won't.

How will you get the chainline sorted? (I used a 88mm chainset and messed with the spacing - its marginal)


 
Posted : 17/02/2014 1:46 pm
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cynic-al cut and shut a fat Marin bouncer

Ah, yes so he did - will have to search that one out, although looking to stay rigid here


 
Posted : 17/02/2014 1:47 pm
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Some one did it with an on one

29er frame with 26" fat wheels?


 
Posted : 17/02/2014 1:54 pm
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clubber - Member
29er frame with 26" fat wheels?

Nope, 26er I think.


 
Posted : 17/02/2014 1:55 pm
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Will your forks have clearance? Std 29er ones won't.

I'm working on the basis of cutting near the crown & installing inserts to increase axle width to 135mm & build the front wheel onto a rear hub, so this should give me clearance.

On the bottom bracket, again I was thinking of cutting away from frame & increasing to 100mm width again with insert, could then either get 100mm BB or even more make shift get a HT2 crankset & cut & shut that to suit the BB width - or is that stretching the bounds of metalurgic possibilities ? Could manage 1x but would prefer 2x if I can.


 
Posted : 17/02/2014 1:58 pm
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Chainline/BB/Cranks are the place to start unless you are only going half-fat (front only) or 29+.

The other option would be the 26x3" Dirt Wizards


 
Posted : 17/02/2014 1:58 pm
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doner frame is 26er, forks are 29er


 
Posted : 17/02/2014 1:59 pm
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The home made 100mm crankset has been tried - check MTBR. It was unsuccessful.


 
Posted : 17/02/2014 2:23 pm
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I'd just buy fat forks.

Converting std HT2 cranks to 100mm would be a feat of engineering IMO. In fact widening the BB seems fraught with problems IMO.


 
Posted : 17/02/2014 2:25 pm
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Should be lots of steel on one fatty forks getting sold pretty soon as people fit the carbon ones.


 
Posted : 17/02/2014 2:30 pm
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Converting std HT2 cranks to 100mm would be a feat of engineering IMO

was my thoughts too & if it has already been tried ^^ ๐Ÿ™

A mate has a Pugsley, so will have a good look at that before I get the hacksaw out, hopefull plan to have a go with widening the BB & forks though, not like I have much to lose


 
Posted : 17/02/2014 2:34 pm
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Can you not get square taper BBs to fit given how much simpler that would make the whole process?


 
Posted : 17/02/2014 2:35 pm
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Bike 24 do a [url= http://www.bike24.com/1.php?content=8;navigation=1;product=7173;page=1;menu=1000,2,81;mid=170;pgc=0;orderby=4 ]truvativ bb[/url] for about thirty quid then just pick up cheap cranks.


 
Posted : 17/02/2014 2:39 pm
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Can you not get square taper BBs to fit

๐Ÿ’ก thats just the kind of blindingly obvious idea I need to hear ๐Ÿ™‚


 
Posted : 17/02/2014 2:40 pm
 Keef
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I have a kona unit 29er that I converted 3 years ago,rides great,in fact it worked so well,I did one for a mate too...
Both are ss only,bb width for chain/chain stay/tyre clearance is the main issue,loads of measuring,thinking etc,cutting and welding is the easy part ๐Ÿ˜‰


 
Posted : 17/02/2014 2:54 pm