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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 02-24-06, 12:32 PM   #1
icy_edge_ofTime
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Fixed Gear Specs - need opinions

Newb to the board. My friend in NYC has got me fixed on getting an IRO, my first fixed gear. By far the best set-up and deal out there. On top of that Tony actually returns my email (this cannot be said for most out there). Great builder, great bike - how can you go wrong?

I would primarily be riding my 30 mile R/T commute. In Los Angeles, to Santa Monica, mostly flat, with one hill. (200+ feet elevation gain/loss either way).

I've settled on either the IRO Mark V or IRO RobRoy. Since no one sells these out here I wanted to solicit some opinions. For one, the wheelbase between these two (at 56) is big, but not vast. Mark V at 96, RobRoy at 103. In all aspects the Mark V is the bike for me - more agile, mainly. Has anyone had some distance experience on the Mark V? Comfortable? or no? Mark V also seems a more city oriented, street bike than the RobRoy.

Second, since this is my first fixed. What gear set-up should I roll on? 46x16 seems standard. I guess I could put an 18 on the flip side if need be. Since I am on mostly flat terrain, any thoughts?

thanks for the tips. see you on the streets.
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Old 02-24-06, 12:47 PM   #2
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i heart my mark v.

46/16 is a 75-inch gear (www.sheldonbrown.com/gears for an explanation of that). i ride it and i love it, but i'd recommend starting off a bit lower, like maybe 70 inches or something, so that you can build up your 'spin'--a smoothe, circular rotation of your legs--and get a bit more graceful at acceleration and deceleration.
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Old 02-24-06, 12:53 PM   #3
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I have a Mark V with at 46x16 and an 18 on the flip side. That gearing is pretty good for city riding, especially if it's flat.
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Old 02-24-06, 12:58 PM   #4
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i'd be willing to wager that 30% of this board rides a Mark V.
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Old 02-24-06, 01:47 PM   #5
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If you want to run fatter tires, fenders, a rack, etc... the Rob Roy is the way to go. I don't think you can go wrong either way.
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Old 02-24-06, 01:48 PM   #6
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thanks for the info. as i suspected 46/16 with 18 on the flip.

mark V is the answer.
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Old 02-24-06, 01:49 PM   #7
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Isn't it the Jamie Roy?
Isn't a Rob Roy a cocktail?
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Old 02-24-06, 02:18 PM   #8
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jamie roy is the alu bike. rob roy is the steel cx bike.
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Old 02-24-06, 02:19 PM   #9
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Ah, I had never heard of the Rob Roy.
Nevermind.
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Old 02-24-06, 02:21 PM   #10
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Quote:
Originally Posted by icy_edge_ofTime
thanks for the info. as i suspected 46/16 with 18 on the flip.

mark V is the answer.
suggestion:
get a fixed/fixed hub. you can put a ss freewheel on if you want, but you also have the option of the other fixed side. more practical, yeah? plus, it means your hub isn't ruined if you accidentally strip one side.

anyway, consider starting off with a bit lower gearing.
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Old 02-24-06, 03:05 PM   #11
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i loved my mark V when i had one. the only gripe i had was that i carried it up a lot of stairs and that non-circular toptube hurts like a B on your shoulder, but thats a miner gripe.

as for gears, when i started on a fixie i used 42x16 and i think it really helped me with skids and skips. now i can skid fully weighted with that gearing.
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Old 02-24-06, 04:09 PM   #12
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I've never ridden a Mark V. I have a Rob Roy set up as a commuter (fenders and rack) with Tony's deluxe fixed wheelset. It's a very stable bike. In large part I think this is coming from the relatively long stem (120) that I am running. It's worked out very well for me banging around on rough city pavement.
If you plan on running fenders the Rob Roy is set up with V-brakes which IMO makes fender installation easier.
Since I don't know how strong you are I won't offer gearing suggestions.
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Old 02-24-06, 04:41 PM   #13
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Originally Posted by baxtefer
i'd be willing to wager that 30% of this board rides a Mark V.
Dah, what's a Mark V?
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Old 02-24-06, 04:47 PM   #14
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Since he's in Cali, he won't have too much use for fenders and such. And I think 46X16 is great to start out, what for to rapidly build up your beefy quads. I got a 17t on the flip side a bit later on, but once I had gotten used to the bigger 46X16 46X17 just seemed too slow.

Some day your bike might even look like mine. Yeah Right!
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