looking for a compact crank......

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tri42

2008-11-15 6:41 PM

Master

2701

Salisbury, North Carolina

Subject: looking for a compact crank......

...50-34.... I have 9 speed 105 components.

From what I understand, Shimano R600 and R700 compact cranks will work wth 9 speed set-up.... as well as FSA cranks.

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holt1997

2008-11-15 9:55 PM

in reply to: #1810443

Extreme Veteran

608

Ellensburg, WA

Subject: RE: looking for a compact crank......

I think I have what you are looking for. I have a shimano crank off of my nine speed. It has a 53-39 but I also have the 50 ring if you want that as well. I honestly have no idea on price. It is used but in good shape. the 53 ring has less than 200 miles on it. Make me an offer.
Scott

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tri42

2008-11-16 7:17 AM

in reply to: #1810675

Master

2701

Salisbury, North Carolina

Subject: RE: looking for a compact crank......

Thank you for the offer. I have a 53/39 now and need a 50/34.

Thanks again !

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RSPDiver

2008-11-16 10:33 PM

in reply to: #1810443

Regular

Subject: RE: looking for a compact crank......

What crank arm length are you looking for, and what general quality/weight level are you wanting? I have a 175 FSA Carbon Pro with matching BB from my (now dismantled) Felt F65.

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tri42

2008-11-16 10:42 PM

in reply to: #1811775

Master

2701

Salisbury, North Carolina

Subject: RE: looking for a compact crank......

My neighbor just installed that crank..... or one very similar.

I have 105 level 9 speed and 172.5 on my 53/39. I'm 5'8" so 175 may be too long... not sure.

What are your thoughts ? Thanks.

Edited by tri42 2008-11-16 10:43 PM

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timdude

2008-11-16 11:12 PM

in reply to: #1810443

Extreme Veteran

510

Louisville KY

Subject: RE: looking for a compact crank......

The smallest chain ring you can put on a 130mm BCD(53 39crank) is a 38 tooth ring. The compact crank has a 110mm BCD hence the 34 tooth ring or even smaller, it has a 74 BCD inner ring set up.

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RSPDiver

2008-11-16 11:13 PM

in reply to: #1810443

Regular

Subject: RE: looking for a compact crank......

I could BS you for my gain, but I kinda think 175 may be a bit long for you. It really depends on your leg length. My inseam is 34", and I go 175 for road bike. There are those that say crank length is adaptive, but ultimately it comes down to fit and how high/low your seat is to compensate.

My opinion? Stick with 172.5 unless you have longer legs for your height.

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tri42

2008-11-17 6:03 AM

in reply to: #1811816

Master

2701

Salisbury, North Carolina

Subject: RE: looking for a compact crank......

I found a new Tiagra, 9 spd specific compact for $ 55.... but it's 170 crank arm length. ( that crank only comes in 170 or 175 I think, no 172.5 )

My inseam is 29.5 ""... tempted to go for that one. Think 170 is too short ?

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greenmtnman

2008-11-17 8:17 AM

in reply to: #1810443

Expert

758

Morgantown, WV

Subject: RE: looking for a compact crank......

I had an FSA triple with 172.5, then I had a double PZ racing crank at 175, and then I immediately went to the crank I have now- I'm on a shimano R600 at 170, and I can't tell the difference between any of them.

Granted, I made major bike changes between each crank, so I may have noticed more of a difference if my bike setup had stayed static.

Remember, we're talking 2.5-5 millimeters. You will be fine with the 170. you'll just have to raise your seat a tiny bit.

PS- I'm 5' 9", almost 33inch inseam and the 170 is fine. The 175 was fine too.

(disclosure: I'm not a bike fitter)

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tri42

2008-11-17 6:48 PM

in reply to: #1812028

Master

2701