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The M&M Mars - Shimano connection...(5 posts)

The M&M Mars - Shimano connection...Ahimsa
Oct 11, 2001 7:15 PM
If you add caramel to a 3 Musketeers it becomes a Milky Way, add peanuts and it is a Snickers. Swap peanuts for almonds and you get a Mars bar.
Seems the same with Shimano road cranks...Sora plus one aluminum ring begats Tiagra. All aluminum rings + hollowtech becomes 105. Slighlty more hollow and you get infintum, ad nauseum.

My question: Does the idea of hollow crank arms concern anyone but me? Does the durability of a hollow aluminum crank sound dubious? No doubt ridden many miles by many of you; how have they held up? Any broken arms (crank or flesh) due to heavy use?
I am wary of less durable components, but my cross frame commuter needs a drivetrain update and Shimano looks like a good deal. It occurs to me that to alay my fears, I might wish to build up a Tiagra triple with Ultegra rings and hardware to get a non-hollow, all aluminum setup that weighs in around a mere 60 to 80 grams more than Ultegra triples. Is this do-able? Any tech flaws in this? Anyone wish to claim that my durability issues are ludicrous and sell me on the 105 hollows? I prefer tough parts with tried and true designs.

Comments are appreciated.

re: The M&M Mars - Shimano connection...BAM
Oct 12, 2001 4:41 AM
I have not seen any problems with the HollowTech design itself. It gives a nice light and stiff crank arm. The only time a problem occurs is when someone (bike manufacturers or mechanics) do not line up the splines in the arm properly with the B/B spindle splines and the rider ends up stripping the inside of the crank arm where the B/B spindle interfaces with it. This is just stupidity during assemble and is easily avioded. Think of this, would you rather ride a frame made of solid bars instead of hollow tubing? A hollow structure is a sound design when done correctly. How many solid crank arms have failed over the years? More than we could imagine or would want too. It all comes down to design and manufacture (proper casting and materials). Shimano seems to have done a bang up job with the HollowTechs, they are sweet cranks. Go For it.
re: The M&M Mars - Shimano connection...flyweight
Oct 12, 2001 9:09 AM
Never seen a hollowtech crank fail. Wish I could say the same for Campy! Seen plenty of Campy Veloce cranks fail.
Thanks for the info...I'll try the hollow 105 triple...cheers!Ahimsa
Oct 12, 2001 3:50 PM
re: The M&M Mars - Shimano connection...nmDread The Fred
Oct 18, 2001 9:09 PM