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I had a bb shell chamfered for a Mavic bb by a local engineer for £10’s worth of beers. Am near Didcot but a good small machine shop should be easily able to do it - the tool to DIY it are like hens teeth and the best I could do was someone would hire it to me for a £100 deposit
I saw a Mavic double bb for sale for about £30 a while ago, will try and track down where if that’s any help?
crossedthread
Anyone got any experience getting Mavic Starfish cranks to play nice with a 10 speed Campag groupset?
I love the look of the cranks but as far as I know they were from the 8 speed era, so I'm guessing the Mavic chain rings are going to be too wide/fat and as far as I know Mavic did not do any 9/10 speed rings for it.
Also I'm not clear on the rig sizes possible, I did want a traditional 53/39, and tho the 53 should be fine I recall reading somewhere that the Starfish crank needed at least a 40t small ring, ruling out a 39t, so its looking like I may be limited to a 53/42. I'm fine with this if that's the only option, but am not 100% on the small ring size thing so wondered if anyone else knew?
Google tells me the Starfish has 130 BCD chain rings, and a quick check on ebay shows both Stronglight and TA do 130 BCD chainrings, like this....
...But both have a big oval gap on the ring above each crankbolt, which will look shit and be half covered by each arm of the Starfish, so I've been looking at other possible 10 speed 130 BCD rings that will look better with the Starfish.
The best I can find that won't look as visually gopping as the Stronglight ones above, and kind of match the lines and shape of the Starfish, however these are by Shimano and SRAM. They are both 10 speed 5 arm 130 BCD, so will either of these rings work OK with the Starfish crank and a Campag groupset, it just feels very much like crossing the streams in Ghostbusters, which I'm hard wired to believe is a bad thing, but what thinks the hive mind? Am I playing with fire, will I get burned doing this?
Here are the 2 rings in question, first a 10 speed Dura Ace FC7800...
...and a SRAM Powerglide
OK that's the first bit, the second bit is the BB. From what I've read the Starfish cranks were designed to fit with the Mavic BB, which is highly rated and seems bomb proof, but from what I can gather it needs the BB shell facing at an angle of 45 degrees or something to fit the Mavic BB, which is some Mavic tool that no bike shop near to me in South London seems to have. And I've not called around extensively but any idea of anyone in London that may have such a tool? I thought I could try Condor but still think their range is too modern so I don't fancy my chances. And even beyond London, anyone else in the UK might have one? Or alternatively any metal tool experts that could do this weird angle BB facing? I don't mind sending frame away in post to places beyond London if needed.
The Mavic BB's are pretty spendy so I'm reluctant to splash out on one if I can't even get it fitted, so the other thing I'm wondering is are they are other square taper BB's I can use with the Starfish, but no idea what BB if any I can use other than Mavic, so any suggestions welcome, thanks.
I know the common sense answer is probably forget it and just get a silver Chorus/Record crank, but I really like the Starfish and really want to make it work if I can.