• Legitimately getting a 42 between the chainstays needs the inside of the stay to be at least 25mm from centre. Fitting a road double chainset needs the outside of the stay to be no more than 37mm from centre. Do the maths. While Isen shouldn't be claiming that it can be done, there is some responsibility on the part of the customer to realise that if something looks too good to be true, it probably is.
    https://timharford.com/2021/04/cautionary-tales-number-fever/

  • Add another 10mm for those promised mudguards!

  • road double + 42mm tyre at 650 is very doable, less space at 700 but still not impossible at all. I have built several frames that clear that + mud. Im sure Isen are capable of it also, they are very good, probably just one of those things that slips through. I cant imagine building frames for a living, would be a pita.

  • I fail to see how any responsibility should lie with the customer, the frame builder is supposedly the expert. I also checked with them about 4 times on email that it would definitely fit so feel that should be sufficient.

  • wut? 99% of the consumers wont know this. Some of us do but we are weirdos.

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