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re:Ergomo and Power Tap comparison
In category Racing
Written by eggphish1

Some of you may know that the Ergomo bottom bracket-based power meter has recently entered the market. Although some Ergomo dealers have done private testing and comparisons of their systems, until now there has not been any publicly-available data set that could be used for independent evaluation. Last week, Ergomo-USA put some data files on their website that were collected during a two-hour rid

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re:Suntour Cyclone Cranks ???
In category Tech issues
Written by GratefulNole

Three related questions:

1) Does a Suntour Cyclone crank need the same taper bottom bracket spindle (ISO) as does a Suntour Superbe Pro crank, or can the Cyclone use a
"standard" JIS taper spindle, such as a Shimano?

2) And, no matter the taper, what length bottom bracket spindle does a
Suntour Cyclone need?

3) Does anyone know some good online sources for tech info, such as this question abo

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re:Self-extracting crank cap loose: ok to ride?
In category Tech issues
Written by dazedave

Is it okay to ride with the "dust cap" ring on my new self-extracting crank insufficiently torqued until my pin spanner comes in via mail order? I've tightened it with a tool that I improvised out of a snap ring plier set, but I can't get much torque into it.

It does seem tight enough that it won't randomly thread out, but is there any sort of screwing force on it that I don't know about?

I expe

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re:Sugino GP crankset - help please
In category Tech issues
Written by Pink

I'm a bit of a newbie on cycling repair etc, so please bear with me

I'm building up a commuting hack from an old road frame and I'm looking for a little advice on bottom bracket size to go with a Sugino GP triple crank (or chain) set.

I picked up this set cheaply from a mate, but it doesn't have any guide for BB sizes in a standard frame. The old BB was a shimano 68 x
113mm coupled to a Sora tri

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Help me decide on a great commuter bike
In category Tech issues
Written by jellyphisher

I'm in the process of trying to put together (or buy if there's one available) a great commuter/bad weather bike.

I intend to use it mostly for commuting (12 miles each way in reasonably hilly terrain--takes me about 45-50 minutes), especially in rainy weather.
When the weather is nice and the roads are clear, I'll probably ride my road bike instead.

My 54cm Trek 5200 fits me like a glove, so I'

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re:Weird Back Pain ... One bike, not the other
In category Tech issues
Written by Bluecynic

I ride a Norco Java MTB, and a Giant TCR2 Roadie...

On the Java, running slicks, I can average around 36 km/h spinning at what I guestimate to be a cadence of around 90 RPM... On the Giant, in a similar gear ratio, I can average about 27 km/h, with a cadence of around 80 RPM, but also get a lower back pain...

Now, I've measured both bikes, being seat to bottom bracket, seat to stem, and front h

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re:Ergomo and Power Tap comparison
In category Tech issues
Written by tiger jh

Some of you may know that the Ergomo bottom bracket-based power meter has recently entered the market. Although some Ergomo dealers have done private testing and comparisons of their systems, until now there has not been any publicly-available data set that could be used for independent evaluation. Last week, Ergomo-USA put some data files on their website that were collected during a two-hour rid

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Trek 520 Gearing Change
In category Tech issues
Written by raab

I want to change the Shimano 105 crankset on my Trek 520 (2003)
to a Shimano Deore LX MTB crankset FC-M572 (22-32-44)
Not sure which bottom bracket spindle length I should get - 113 or 118.
I'd normally get the 113 but the 105 bb was 118.

Any advice would be appreciated
Bill

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re:older dura-ace crank, newer pedals
In category Tech issues
Written by Missie

I have an older bike with a dura-ace crank. The crank accepts a pedal with a 25mm bolt. I'd like to fit the bike with modern Look pedals - which have a standard thread of 9/16 (I think).

Does anyone know of an adapter that will allow modern pedals to be attached to this older crank?

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re:chainline on fixed gear
In category Tech issues
Written by puffanug

I am building a fixed gear bike and I am wondering a little bit about the
"perfect chainline" that I have been reading about on several web pages.
Why is it so necessary to have it perfect (non of the web pages a visited really explains "why")? Does a millimeter or two of makes any different?

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