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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 09-05-10, 09:37 AM   #1
ninniku
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I flopped

So I took the plunge, did my first bike mechanic work in probably 10 years, and flopped my rear wheel to fixed. Rode around Komazawa Park, just to see if I would die from fear. I did not die from fear. I have a couple of questions for the heady folk here, however:

First, I made use of what I assume are chain tensioner screws in my dropouts to fine-tune my wheel's alignment. Is this a bad idea? I had a hard time straightening the wheel out otherwise.

Second, real noob question. I jacked up my seat hight because it seemed that my legs weren't extending enough. Then my arms started hurting. It just seemed like I wasn't getting enough leverage from a sitting position.

Finally, I have a carbon-fiber ( I think ) seatpost; if I'm looking to swap it in, do I need a special lubricant?
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Old 09-05-10, 10:22 AM   #2
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Welcome to the dark side.

Those chain tensioners are there to be used.

Saddle height should be adjusted so that when your foot is on the pedal at the 6:00 position, you should have a slight bend in your knee. At the same saddle height position, your leg will be straight when you place your heel on the pedal (without leaning to one side to reach) .

Don't use grease on a carbon fiber anything. FSA makes a special carbon installation compound but it's not 100% necessary.
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Old 09-05-10, 11:58 AM   #3
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Don't use grease on a carbon fiber anything.
Really? I was told to grease my carbon fiber seatpost on my road bike, which I did without any issues. I never knew it could be a problem.

OP, if you feel like you constantly need to stand to pedal, it sounds like your gearing could be too high.
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Old 09-05-10, 09:50 PM   #4
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Really? I was told to grease my carbon fiber seatpost on my road bike, which I did without any issues. I never knew it could be a problem.
The problem is when people put grease on them the're all slippey slidey in the seattube and people think to just keep tightening and then BAM broken seatpost.

No grease, no problem
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Old 09-05-10, 11:22 PM   #5
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Really? I was told to grease my carbon fiber seatpost on my road bike, which I did without any issues. I never knew it could be a problem.

OP, if you feel like you constantly need to stand to pedal, it sounds like your gearing could be too high.
The purpose of grease to prevent rusting and corrosion and carbon fibre can not be corroded or rusted so it is pointless to have it.
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Old 09-06-10, 07:39 AM   #6
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It's also my understanding that some types of grease can actually cause carbon fiber to expand slightly, which isn't good when it comes time to remove or raise/lower your seatpost.
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Old 09-06-10, 02:57 PM   #7
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Second, real noob question. I jacked up my seat hight because it seemed that my legs weren't extending enough. Then my arms started hurting. It just seemed like I wasn't getting enough leverage from a sitting position.
Raising your seat effectively moves your seat back as well. Messing with seat position will change how much weight your hands have on them.
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Old 09-06-10, 07:59 PM   #8
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So I'll probably need a shorter stem to correct for it?
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Old 09-06-10, 09:05 PM   #9
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no, you'll need to move your seat forward a little
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