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Thanks Hovis, this is great.
I took the bike to the guy who did my initial bike fit to help me apply the measurements so they should be right, but i have shifted the saddle forward by about 3mm since he set it up as it felt more comfy.
I may get the tape measure out and have another look myself as the bike fitter seemed in a bit of a rush when he was helping me out. I reckon if anything is off it's the saddle-BB setback or the handlebar-saddle length, so it may be a case of changing stem
Have checked the crank length too, and it's the same on both bikes.
The mystery continues...
jim1985
TTM
Should be able to. First get your saddle angle correct. I use the bubble app on my phone and a piece of wood on top of the saddle (to take the saddle curvature out of the equation). Do this for both bikes on the same piece of floor in case of any dips etc. I do it using my turbo on the same spot.
Then get your saddle height and setback relative to BB centre correct first. You can get that identical on both bikes. Its useful to have a reference point at the centre the saddle rails to measure through to the saddle top. Having the same saddle on both bikes helps.
For setback you can measure from a wall to BB centre and then wall to saddle tip and take the difference. Once you have the saddle sorted, get the reach and drop from the saddle nose to the handlebars the same. For reach, depending on where you spend the majority of the time when cycling, you might want to measure from saddle tip to the hoods of your levers. To get the drop the same just measure off the floor to top of saddle and to the bars then take the difference. Get the height correct via stem spacers and the reach via correct length stem.