Azonic Posted June 18, 2013 Posted June 18, 2013 So my gears are starting to skip when I ride on bigring (I use 3x10) and halfway up the cassette (far from crosschaining). I know my bigring is getting a little worn out as I use it allot. My bike is a BB30 frame that's currently converted with (home made) adapters and bits of other old BB's to make the current Truvativ GXP Style crankset work. The crankset is a 2009 model that was meant for 9 speed. Not entirely sure, but I believe 9 speed cranksets to have chainrings that are sliiiiightly further spaced apart than with 10 speed. So, it can make for slightly delayed shifting. Speculating on that though. So the dilemma is this... Do I just replace the chainrings and carry on as is... ... Or dump the crankset and get a purpose built BB30 crankset? Getting the crankset will run about R2000 more expensive than just getting two chainrings. What's going to haunt me more, spending R2000 that's not entirely needed, or knowing that what I'm riding itsn't 100% right.
No Name Posted June 18, 2013 Posted June 18, 2013 Just buy the damn crankset. JaakCT, Sidekick Racer, gummibear and 1 other 4
rouxtjie Posted June 18, 2013 Posted June 18, 2013 Gooi weg, get the new one....don't throw good money after bad Warren_G 1
(Deon) Posted June 18, 2013 Posted June 18, 2013 If you can get a bcd that matches your 9sp, then why not replace just the rings with 10sp?
Azonic Posted June 18, 2013 Author Posted June 18, 2013 If you can get a bcd that matches your 9sp, then why not replace just the rings with 10sp? Its not the rings that make a crankset 10sp, its the cranks and how they space the rings. I think.
rouxtjie Posted June 18, 2013 Posted June 18, 2013 oh and when you buy again....move away from GXP....worst designed piece of ***** I have ever had the displeasure of owning, right behind it is Avid Elixir brakes, but I am hi-jacking your thread now....get shimano xt 10 spd crank....happy days. Warren_G 1
Azonic Posted June 18, 2013 Author Posted June 18, 2013 get shimano xt 10 spd crank....happy days. Problem 1) Shimano don't make BB30 cranks.Problem 2) I use 180mm cranks. The only 180mm / 3 x 10 / BB30 crankset on earth is a SRAM X9 one from CRC @ R3200.
Mojoman Posted June 18, 2013 Posted June 18, 2013 oh and when you buy again....move away from GXP....worst designed piece of ***** I have ever had the displeasure of owning, right behind it is Avid Elixir brakes, but I am hi-jacking your thread now....get shimano xt 10 spd crank....happy days.Am with you here, I think this is the one I have on my Ghost? If so what a POS! Creakers deluxe!
rouxtjie Posted June 18, 2013 Posted June 18, 2013 (edited) Problem 1) Shimano don't make BB30 cranks.Problem 2) I use 180mm cranks. The only 180mm / 3 x 10 / BB30 crankset on earth is a SRAM X9 one from CRC @ R3200.Dont you get adaptors? BB30 to BB92 converters. Only reading your 180mm comment now....but ja, Pity you have to stay GXP because of this Edited June 18, 2013 by rouxtjie
Bobbo_SA Posted June 18, 2013 Posted June 18, 2013 My 2c - if your gearing is working fine this way then replace the ring(s). Maybe re-spray the crank so it appears new and pretty while its off that way your head is happy and so is your wallet -
Azonic Posted June 18, 2013 Author Posted June 18, 2013 Am with you here, I think this is the one I have on my Ghost? If so what a POS! Creakers deluxe! Creak it does. Was looking forward to changing the BB with a nice ceramic one but then found out that the GXP BB needs a 24/26mm axle, aka, Shimano. No ceramic BB for me then.
rouxtjie Posted June 18, 2013 Posted June 18, 2013 (edited) Creak it does. Was looking forward to changing the BB with a nice ceramic one but then found out that the GXP BB needs a 24/26mm axle, aka, Shimano. No ceramic BB for me then.Eish the creak I can handle, its the lifespan that make me naar....worst = 300km out of BB, best 800km. Called it a day just before joberg2c this year since my records show that I would have had to replace the BB at Jolivet... But you can extend the life by a bit by opening it up frequently, cleaning and new grease....schlep though considering shimano is fit and forget. Edited June 18, 2013 by rouxtjie
Azonic Posted June 18, 2013 Author Posted June 18, 2013 What does this need to be able to work in a BB30 frame? http://www.chainreactioncycles.com/Models.aspx?ModelID=67199 This? http://enduroforkseals.com/id385.html Or is there something better? Would love to dump the anker BB30 adapter that's in there now.
BogusOne Posted June 18, 2013 Posted June 18, 2013 What does this need to be able to work in a BB30 frame? http://www.chainreac...x?ModelID=67199 This? http://enduroforkseals.com/id385.html Or is there something better? Would love to dump the anker BB30 adapter that's in there now. Jip that's it. Was running that same setup a while back and works well. You can even run a sram crank on that with just the step down spacer inserted on the non drive side rouxtjie 1
Azonic Posted June 18, 2013 Author Posted June 18, 2013 Jip that's it. Was running that same setup a while back and works well. You can even run a sram crank on that with just the step down spacer inserted on the non drive side But that adaper is *** expensive. That just puts me right back up to the plain BB30 crankset price bracket.
BogusOne Posted June 18, 2013 Posted June 18, 2013 But that adaper is *** expensive. That just puts me right back up to the plain BB30 crankset price bracket. Cant you get it local? Didn't pay that much for mine (self confessed cheapskate remember ) Pity I gave mine with my Kappi frame when I sold it otherwise you could have had it for mahalla
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