Dura ace crankset 50-39

nurul

Looking to purchase this crankset in the quoted size. I have seen it on the website but never in any shops. Has anyone ever been able to order this?
Recently bought a Scott Adict R4 but to my horror it is only compatible with shmano cranksets. LBS managed to fit something in the bb area so that my old FSA SLK crankset (2005) would fit it. Scott's answer when asking them why they did not specify on their website that this frame was only Shimano compatible was they would take on board my comments for the future. Scott, that aint good enough.He new Trek Madone had a similar problem but they produce an adpator for Campy chainsets. Apparently the Scott R4 bottom bracket is not wide enough for a Campy chainset. Even the LBS was unaware of this. Scott simply said that in the distributor workbooks it say that the R4 has an integrated bb for shimano. So the moral of the story is before you buy a frame or complete bike with Shimano on, check the small print in the distributor workbook. I think Scott has really let me down on this one. If you refer back to a recent thread I started about whether a Shimano crankset was compatible with a campy group, well there you are. Why dont I buy an FSA crankset in compact. FSA cranksets creak like hell in my experience. So the Dura Ace 50-39 is the nearest I would get to a compact. Wonder if I could stick a 36 chainring on the dura ace crankset??? Recently I changed my 2000 Record carbon 10 spd shiters to the new fangled Record QS. The shifting is faster and quieter. I run a dura ace chain but get the feeling that a campy one is faster. I also bought a centaur CT front mech which is steel and rigid as well as faster shifting. THis was complemented with a centaur rear mech. My friend who I have just finished training with in Mallorca runs 2007 full record and I sometimes get on his bike to comapre shifting. Does any one else mix and match within the campy groups?

__________________
Bike ridden in Spain:
Scott Addict 2008
HED JET 50mm 2007
Chorus/Record mix
12-25 53-39
7,1kg
Also ride in the UK:
Cannondale Six13 Pro
Rolf Vectpor Pro (1805g)
Chorus/Centaur 10v mix (2005)
12-25 52/39
7.5kgs

Peter@vecchios

Shimano doesn't offer a DA crank with 50/39. shimano does make a compact-R700, now Ultegra, in 50/34. All use the same BBs so they will work on the Scott. a 36t will not fit onto the 130mm chainring diameter DA crank but you can add a 39t on a 110mm chainring diameter crank, like the Ultegra compat.

Just for info, the innards for the 2007/8 'QS' Record and 2000 are identical except for a carbon/resin spring carrier(RH lever) and drilled out and teflon coated shift disc.

alfeng

FWIW. I've only had matching Shimano group components once (Ultegra 6500 because I was initially told that ALL of the "integrated" components had to be from the same group -- I swapped the Ultegra rear derailleur for an XTR rear derailleur ... much to the chagrin of those who told me it couldn't be done) + matching Campagnolo group components twice (Nuovo Record way-back-when & a Chorus group in 2000) -- I eventually ended up swapping the NR front derailleur for a Dura Ace front derailleur on the earlier group & the components of that Chorus group were eventually separated ... so, I generally mix-and-match Campagnolo components from various Campagnolo AND other [Shimano, FSA(!)/whichever] groups.

Now, with regard to mis-matched BBs ...

I'm not quite sure what the conflict is ...

Did your LBS fit an insert akin to the M.O.st-to-English BB adapter to fit an ISIS (?) BB into an integrated BB shell?

OR, are you saying that there wasn't clearance for the chainrings relative to the chainstays?

FYI. The smallest 130BCD chainring is a 38t (Warhawk Industries briefly had a 37t 130BCD chainring).

nurul

Hey peter. yes they do. Check out the shimano website. In fact i was about to order one from Macario today and it is in stock in Spain. But it is tru that it is not small enough to put on anything smaller than a 39. What a shame that dura ace does not make a compact!!!!! Why though??? The main problem I have with campy is tha it doesn't make a 12-27. The 13 on a 53 is too small to keep up on the descents and makes life difficult when gunning it behind Olano in QUebrantahuesos. Although the 13-26 is useful sometimes. I would rater see campy make a 12-27 like shimano but obvioulsy they won't to force people to adopt compact. The other option is to buy a cannondale SI crankset but are they only compatible with SI bb cannondale frames or are their versions available for non cannondale frames??

__________________
Bike ridden in Spain:
Scott Addict 2008
HED JET 50mm 2007
Chorus/Record mix
12-25 53-39
7,1kg
Also ride in the UK:
Cannondale Six13 Pro
Rolf Vectpor Pro (1805g)
Chorus/Centaur 10v mix (2005)
12-25 52/39
7.5kgs

nurul

No. The Scott Addict 2008 R4 is not a threaded bottom bracket. It only takes shimano cranksets. We have fitted my old fsa using an adaptor which the mechanic made/found etc. Does that explai your question??

__________________
Bike ridden in Spain:
Scott Addict 2008
HED JET 50mm 2007
Chorus/Record mix
12-25 53-39
7,1kg
Also ride in the UK:
Cannondale Six13 Pro
Rolf Vectpor Pro (1805g)
Chorus/Centaur 10v mix (2005)
12-25 52/39
7.5kgs

alfeng

I previously made the prognostication that Shimano will label a compact crank with the "Dura Ace" label if/when they release their carbon fiber cranksets. So, if I am right AND you can wait ...

FYI. MICHE makes a 12-27 Campagnolo-spline compatible, 10-speed cassette.

IRD will probably make an 11-28 Campagnolo-spline compatible 10-speed cassette, eventually, since they already have a 12-28 9-speed Campagnolo-spline compatible cassette.

You could restack an existing 10-speed Campagnolo cassette with a 28t 8-speed Campagnolo cog -- specifically, I restacked a 12-23 9-speed cassette with a 30t (Shimano cog that was filed-to-fit!) a few years ago; so you could start with a 11-/12-23 or a 12-25 if you wanted to ...

alfeng

Yes ... BUT, it doesn't explain your decision to use your old FSA crankset (other than cost, of course). Is your older crank/BB an ISIS or something else? Are you only planning to use the FSA crankset for this season, or is that your ("semi-permanent") choice for the SCOTT frame?!?

FWIW. If the cartridge bearings in an UltraTorque BB have a different/larger-or-smaller OD (outer diameter) than the cartridge bearings in the Shimano/FSA external BB cups, then you can have go to a "bearing" shop and purchase/order a set of bearings whose dimensions will fit the frame's integrated BB & (of course) the spindle (25mm for Campagnolo & 24mm for Shimano/FSA).

If the the UT cartridge bearings have the same OD (which is more-than-likely the case) as the Hollowtech-II/MegaExo bearings, then you CAN install a Campagnolo UT crankset whenever you finally choose whichever new crank you want.

BTW. I presume (perhaps a big mistake on my part!) that TREK (for example ... unlike, Cannondale) would not have created a frame which uses an integrated BB unless there was a common OD size for the cartridge bearings; so, I have to presume the same would be true for SCOTT's integrated BB.

You could even buy some "replacement" Ceramic bearings if want to spend more money!

Obviously(?), the TREK frame can probably use the bearings from a GXP BB, so that makes the likelihood of the OD of the Campagnolo bearings being the same much higher.

If you wanted to use a square-taper or Octalink BB, then you should probably have chosen a different frame.

alfeng

THANKS for that info ... I think it's what I was asking about in a different thread (if I understand your remark).

nurul

Miche cassettes are a turd. They simply do not shift even acceptably well. I might mate a 12-27 Marchissimo with a 50-39 dura ace crankset. Weighed a 53-39 DA 2007-8 crankset today with BB and comes in at a nice 686g. Record version=652.

__________________
Bike ridden in Spain:
Scott Addict 2008
HED JET 50mm 2007
Chorus/Record mix
12-25 53-39
7,1kg
Also ride in the UK:
Cannondale Six13 Pro
Rolf Vectpor Pro (1805g)
Chorus/Centaur 10v mix (2005)
12-25 52/39
7.5kgs

Fizzy23

[QUOTE=Peter@vecchios]Shimano doesn't offer a DA crank with 50/39. shimano does make a compact-R700, now Ultegra, in 50/34. All use the same BBs so they will work on the Scott. a 36t will not fit onto the 130mm chainring diameter DA crank but you can add a 39t on a 110mm chainring diameter crank, like the Ultegra compat.

I have a DA 50/34 crank set!! 110 bolt pattern for my srm......versatile!!! I can run 53/39.....50/34.....50/38 which i run right now!!

Peter@vecchios

[QUOTE=nurul]Hey peter. yes they do. Check out the shimano website. In fact i was about to order one from Macario today and it is in stock in Spain.

I see from their website they DO offer a 50/39 but I wonder if any of the suppliers I use will stock it.

Fizzy23

Yes but it is the standard crankset bolt diameter of 130. What I am saying is that I have a Dura Ace Compact with a 110 bolt Circle.

The 130 will not let you go below 38T where as the 110 will give you the full spectrum.

Check again.......

alfeng

Okay, inquiring minds want to know ...

• What is the model number for that crank?
• When-and-where did you get it?

Post a pic!