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Difficult to say I suppose without you riding it. Plugged the numbers into an online fit calculator, and assumed 74 was the seat rather than head angle.
Links here for both Mercian and Genesis respectively:
Assuming you’re comfy on your Genesis, the fit would prob be a bit different . Given the exact same stem, post and saddle clamped at the same position the saddle would be 20mm more forward on the Mercian and the bars 20mm further forward and 20mm lower in space.
jupiz-
@jupiz ah thanks so much for this! Feel bad hijacking the thread but it is Mercian related...
Seller sent the build sheet and is happy for me to test ride it. Angles are 74 and 74.5 (is the 74.5 H/T?) Seller's inside leg is 37” to the floor.Genesis fit wise I have no idea. I have it with a normalish length stem and a slightly layback post and it is too long for me I think. Did 90km at the weekend and it was fine, slightly stiff back but I think that is my fault for sitting at a desk all day and not stretching
bobble
@jupiz ah cheers. Frame angles 74 degrees & 74.5 degrees it says on the advert. Also:
Seat tube, centre of BB to very top of tube = 63.0cm
Seat tube, centre to centre = 60.5cm
Top tube, centre to centre = 60.5cm
Head tube measured inside inner edge of headset cups/outside outer edge = 19.7cm/22.7cm
Chain stay, centre to centre = 41.0cm
Seat stay, centre to join with seat tube = 55.0cm
How do I know if I need a decent amount of setback? Does it being built for someone who runs minimal setback mean they have relatively short legs? Might try and organise a test ride when the rules/ my personal circumstances allow it