MTB fixed gear for urban use
#1
Thread Starter
surly old man

Joined: Sep 2006
Posts: 3,393
Likes: 44
From: Carlisle, PA
Bikes: IRO Mark V, Karate Monkey half fat, Trek 620 IGH, Cannondale 26/24 MTB, Amp Research B3, and more.
MTB fixed gear for urban use
I found an old, worn out MTB frame with horizontal dropouts and a freewheel rear hub that I converted on the cheap to fixed gear. All I had to invest in this thing was a cheapo cog.
I have had a ton of fun on this this thing around town.
How come I do not hear about many others using old MTBs in this way? Seems like the perfect beater for around town.
I have had a ton of fun on this this thing around town.
How come I do not hear about many others using old MTBs in this way? Seems like the perfect beater for around town.
#3
my roommate is my main user of the steel trek that i got when i was in middle school. long seatpost, road stem, SS'ed... it's all good.
it will eventually turn into a low-geared fixed/free touring bike, actually. maybe. possibly.
it will eventually turn into a low-geared fixed/free touring bike, actually. maybe. possibly.
#4
One of my FG bikes is/was a MTB, but sadly, with vertical dropouts. So I had to play around with magic ratios and chain lengths. The chain is still a bit loose, but it's OK. I am building a wheel with the ENO Eccentric, and then things will be perfect.
#5
Fissato Italiano
Joined: May 2006
Posts: 300
Likes: 0
From: Torino, Italy
Bikes: Fixed Gear & Single Speed Only
When I don't want to pay attention to the holes in the pavement I use this thing:

https://www.fixedgeargallery.com/2006/sept/Aldone.htm
Front wheel is a BIG Swhalbe Big Apple 2.35", it's so fun compared to the skinny 700x23c of my other bike

https://www.fixedgeargallery.com/2006/sept/Aldone.htm
Front wheel is a BIG Swhalbe Big Apple 2.35", it's so fun compared to the skinny 700x23c of my other bike
#6
Yup

Joined: Jan 2004
Posts: 3,083
Likes: 6
From: where the sunbeams end and the starlight begins
Bikes: Kona Unit, planet X cx bike, khs fixed gear
Originally Posted by dutret
good quality old mtbs with horizontal dropouts are not incredibly common. Not all that many people bought mtbs back then and a lot of them got used hard. Most probably died a brutal death during the 90's.
Other problem besides lack of horizontal dropouts on most newer mtbs is the hub issue. I needed a 135 to work on my frame. No amount of b/b and hub respacing would work.
Anyway in s/s form

and fixed
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When sadness fills my days
It's time to turn away
And then tomorrow's dreams
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And then tomorrow's dreams
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#10
Yup

Joined: Jan 2004
Posts: 3,083
Likes: 6
From: where the sunbeams end and the starlight begins
Bikes: Kona Unit, planet X cx bike, khs fixed gear
Originally Posted by Jermsy
mine:
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#13
good question.
Joined: Jul 2005
Posts: 41
Likes: 0
those are 1.25" fatboys i put on after getting lots of flats with 1" tires. kona project2 fork. the 38 tooth chainring is the largest i could fit without hitting the chainstay.
i've got a jamis sputnik on it's way, relegating the GT to beater status.
i've got a jamis sputnik on it's way, relegating the GT to beater status.
#14
beam and bikes
Joined: Apr 2006
Posts: 87
Likes: 1
From: Blacksburg VA
My Trek 7K has an ENO eccentric hub and its the jam. I love this frame and can rock 32-18 freewheel for the trails and a 15t cog fixed for the street.
My Rincon is in need of a new rear wheel and its getting a flip-flop hub to replace the shot, converted STX rear hub. No tensioner is needed because it has horizontal drop outs. It went from an entry level 7 spd mtb I bought when I was 13 to a killer SS bar bike in '99 and the frame is going strong 14 years later.
Look for old steel HTs, usually base models. Chances are they have horizontal drops and a bolt-on freewheel or 7sp cassette. Most are high-ten. steel but some are full 4130 chro-mo. Excluding the original purchase price in 1993, I built my Giant for around $70 including a Surly chainring and rear freehub cog, an old cassete for spacers, and a new chain.
Unfortunately I am sans camera at the moment, so I know, this post is worthless w/out pics
Craig
My Rincon is in need of a new rear wheel and its getting a flip-flop hub to replace the shot, converted STX rear hub. No tensioner is needed because it has horizontal drop outs. It went from an entry level 7 spd mtb I bought when I was 13 to a killer SS bar bike in '99 and the frame is going strong 14 years later.
Look for old steel HTs, usually base models. Chances are they have horizontal drops and a bolt-on freewheel or 7sp cassette. Most are high-ten. steel but some are full 4130 chro-mo. Excluding the original purchase price in 1993, I built my Giant for around $70 including a Surly chainring and rear freehub cog, an old cassete for spacers, and a new chain.
Unfortunately I am sans camera at the moment, so I know, this post is worthless w/out pics
Craig
#17
The reason you don't see very many is that most MTBs have vertical or short horizontal drop outs. Old road frames are much easier to find than MTBs with horizontal drop outs. If I could find a decent one I convert it in a heartbeat.
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#19
Senior Member
Joined: Apr 2006
Posts: 654
Likes: 0
From: Ohio
Bikes: vintage Raleigh
Sorry, no pic yet but I'm using my GT Zum as a road/urban ride (then again, I believe that's what its intentions were to be). I'm converting it to a strictly road bike; swaping the bouncy front to rigid, loosing thr gears to a ss, using a bullhorn bar with aero bar end levers, and running 26 x 1.0 tires. I still may run a 700c up front but not sure yet . . . I just can't get comfortable on a road bike so I figured I go this route. MTBU.
#20
good question.
Joined: Jul 2005
Posts: 41
Likes: 0
Originally Posted by bfloyd
Sorry, no pic yet but I'm using my GT Zum as a road/urban ride (then again, I believe that's what its intentions were to be). I'm converting it to a strictly road bike; swaping the bouncy front to rigid, loosing thr gears to a ss, using a bullhorn bar with aero bar end levers, and running 26 x 1.0 tires. I still may run a 700c up front but not sure yet . . . I just can't get comfortable on a road bike so I figured I go this route. MTBU.
#21
Originally Posted by DasProfezzional
I posted these in the SS/FG pics thread, but nobody could appreciate.


That's mah Hard Rock, fresh from its most recent and final clear coat. 26" represent, son.


That's mah Hard Rock, fresh from its most recent and final clear coat. 26" represent, son.
#22
Yup

Joined: Jan 2004
Posts: 3,083
Likes: 6
From: where the sunbeams end and the starlight begins
Bikes: Kona Unit, planet X cx bike, khs fixed gear
Originally Posted by Jermsy
A warning. I had problems running 1.0 tires, about a dozen flats in a month. No trouble yet with 1.25. As I said in posting about mine, careful with chainring selection. Depending on the length of your bb, you may be stuck with 38 tooth or smaller.
__________________
When sadness fills my days
It's time to turn away
And then tomorrow's dreams
Become reality to me
When sadness fills my days
It's time to turn away
And then tomorrow's dreams
Become reality to me
#24
Senior Member
Joined: Apr 2006
Posts: 654
Likes: 0
From: Ohio
Bikes: vintage Raleigh
Originally Posted by Jermsy
A warning. I had problems running 1.0 tires, about a dozen flats in a month. No trouble yet with 1.25. As I said in posting about mine, careful with chainring selection. Depending on the length of your bb, you may be stuck with 38 tooth or smaller.
I'm also using a 42 chainring on the big ring space of my triple crank. I'm using a cassette rear and just spacing the rear cog over to line up with the big ring. If I eventually get a ss specific rear wheel I may have to run the smaller front . . .
#25
good question.
Joined: Jul 2005
Posts: 41
Likes: 0
Originally Posted by bfloyd
Thanks for the warning. Which 1.0's did you try? I'm trying the Hutchinson Top Slicks. I notice that the Fat Boy's 1.25 can run up to 100 psi. They must be fast.
I'm also using a 42 chainring on the big ring space of my triple crank. I'm using a cassette rear and just spacing the rear cog over to line up with the big ring. If I eventually get a ss specific rear wheel I may have to run the smaller front . . .
I'm also using a 42 chainring on the big ring space of my triple crank. I'm using a cassette rear and just spacing the rear cog over to line up with the big ring. If I eventually get a ss specific rear wheel I may have to run the smaller front . . .






