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kgyoung
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« on: April 14, 2009, 10:40:35 AM » |
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My current cranks are 165mm, but I need a new crankset and I found a cheap Ultegra, but the crankarm is longer. It is 172.5mm. Are these too long for me? Anyone have any advice?
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Kris Y.
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Aiar(Izzy)
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« Reply #1 on: April 14, 2009, 10:42:43 AM » |
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That it's a really big transition. I think that you need to sit on a bike with similar geometry to yours and see. If the crank set is not to expensive get it and sell it if it doesn't fit.
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Suffering is the key to success.
The elephant is the only animal with four knees.
אפטון, את בת זונה.....
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ThePrez
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« Reply #2 on: April 14, 2009, 10:47:52 AM » |
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165mm sounds really short with you, that would come in handy at crits though  |
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Blake K.
Leg Hair: No
"A wise man is astonished by everything." - Andre Gide
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Vanessa
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« Reply #3 on: April 14, 2009, 11:52:45 AM » |
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longer cranks = more power needed to turn them over. you will definitely notice the change--which is not to say you shouldn't switch, but i'd wait until the season's over to do so.
on the other hand, what's your gearing? if you go from a 53-39 with 165 cranks to a compact 172.5, the transition will be a bit smoother. but now i am picturing a triple on your giant, soooooo never mind.
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vanessa is not a sandbagger, at least.
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kgyoung
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« Reply #4 on: April 14, 2009, 12:05:48 PM » |
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Yeah, I would be going from a 50 with a 165 to a 53 with a 172.5.
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Kris Y.
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ThePrez
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« Reply #5 on: April 14, 2009, 12:13:25 PM » |
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HAMMERFEST 2009!!!
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Blake K.
Leg Hair: No
"A wise man is astonished by everything." - Andre Gide
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kgyoung
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« Reply #6 on: April 14, 2009, 12:35:27 PM » |
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Okay, new question. Can I replace a 50/39/30 with a 52/39/30 without changing the derailleurs? Also, what is the difference between Italian and English threading on a Bottom Bracket and how would I know which one I need? This is getting stressful.
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« Last Edit: April 14, 2009, 01:55:38 PM by kgyoung »
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Kris Y.
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Vanessa
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« Reply #7 on: April 14, 2009, 02:27:29 PM » |
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you shouldn't have to change the derailleurs, but you'll have to move the front up on the seattube to account for the larger ring. i would assume giant uses english BBs.
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vanessa is not a sandbagger, at least.
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kgyoung
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« Reply #8 on: April 14, 2009, 02:32:43 PM » |
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Thank you Vanessa for that information. I found an Ultegra triple 170mm with a 52 chain ring that is really good price. I think I am going to go with that. (But not until the season is over!)
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Kris Y.
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ThePrez
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« Reply #9 on: April 14, 2009, 02:51:17 PM » |
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ya, pretty much only Italian bikes will use Italian threading. Giant will use English threading.
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Blake K.
Leg Hair: No
"A wise man is astonished by everything." - Andre Gide
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ALF
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« Reply #10 on: April 14, 2009, 03:05:55 PM » |
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would she need a longer chain or is 2 extra teeh fine with the current length?
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Trey Flores
Holla for a dolla- Trey Flores
2012 Specialized Venge
2011 Specialized Crux carbon pro
2006 Felt TK2
2009 BMC TT02
2006 Specialized Stumpjumper
1984 Specialized Stumpjumper
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Vanessa
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« Reply #11 on: April 14, 2009, 03:20:59 PM » |
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depends what the current length is. (yes, that's what she said.)
i just went to a 50-34 from a 53-39 and took out two links, for what it's worth.
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vanessa is not a sandbagger, at least.
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kgyoung
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« Reply #12 on: April 14, 2009, 03:39:50 PM » |
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New cranks and bottom bracket purchased! (And for much much less than originally planned) Thank you guys for all of your help today.
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Kris Y.
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ALF
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« Reply #13 on: April 14, 2009, 03:46:23 PM » |
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where did you get it from and where?
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Trey Flores
Holla for a dolla- Trey Flores
2012 Specialized Venge
2011 Specialized Crux carbon pro
2006 Felt TK2
2009 BMC TT02
2006 Specialized Stumpjumper
1984 Specialized Stumpjumper
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kgyoung
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« Reply #14 on: April 14, 2009, 03:54:39 PM » |
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Kris Y.
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