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Crankshaft stroke measurement

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Crankshaft stroke measurement

Postby coaster » Sun Jul 20, 2025 6:38 pm

I recntly bought a crank that belonged to a mate that sadly passed away last year. It came in a Grand Tourisimo box and says 60/110 on the the lable. However, it doesnt have the characteristid plastic stuffers. It does apear to have a 110mm rod but measurony from the centre of the crank to the centre of the pin looks to be 29mm which to me indicates 58mm stroke? I only have a vernier and ruler for measurement so could be out but was mainly wondering if the stroke increase is achieved with different webs or an offset pin? the pin measures 22mm with the vernier. any thoughts gratefuly recieved ;)
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Re: Crankshaft stroke measurement

Postby Fast n Furious » Mon Jul 21, 2025 2:03 am

If the crank looks used, then this is probably the one that the GT one replaced?
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Re: Crankshaft stroke measurement

Postby coaster » Mon Jul 21, 2025 8:08 am

Fast n Furious wrote:If the crank looks used, then this is probably the one that the GT one replaced?


Thats the thing, it LOOKS new and is spotless. I had another go at measuring it with a clearer ruler and now think its a standard 58/107 crank most likely a MecEur going by the black webs
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Re: Crankshaft stroke measurement

Postby Adam_Winstone » Mon Jul 21, 2025 11:53 am

I too had wondered whether this was the crank that a GT crank replaced, even at the concept stage, meaning this MEC may never have been fitted.
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