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Following my earlier thread. I have ordered an 2022 Nukeproof Reactor 290 Elite. I'm right on the boundary of large/XL frame size and need to order by post. Based on the numbers in the table below, which size would you recommend?
I currently ride a Ragley Big Al (hardtail) in XL (20inch frame), fit is generally good but very slightly on the shorter side of things with the saddle rammed all the way back. Riding = general trails, bike parks, Glentress, BPW, low/medium level jumping & XC.
6:2ft (189cm), 33inch inside leg & 82kgs. Nukeproof recommended I work out my "ape index" = arm span/height (191/189) = 1.01. I recent sat on a 2021 Giant Trance (details in table below) which felt perfect geometry.
Do you have stack numbers?
It's a consideration in itself, and also means you can work out normalised reach to make a fair comparison if the bikes have vastly different stacks.
Geometrygeeks is your friend here.
Geometrygeeks is your friend here.
Great shout, so the XL Nukeproof is lower and longer than the current Ragley. Now the key one to me would be the "effective top tube" (NP=9.2mm longer) and "reach" (NP=29mm longer). I could easily counter the extra 29mm reach if it felt a bit long by setting the saddle more forward and reducing the NP stem from 45mm to 30mm. I think the answer appears to be the XL frame.
From "Geometry Geeks website"
The geometry geeks for the large shows the bike to be overall smaller than the Ragley.
Images are broken now.
If your Big Al is 2020 or later, the XL NP has a 24mm lower stack. If you used 25mm of spacers under the stem (rather than a riser bar) to compensate for that, you'd reduce the reach and ETT by 12mm. So that's another option for adjusting the reach to your preference, without adjusting the steering feel as stem length would.
You might not actually want the same riding position, but it's a useful comparison the normalised reach and ETT after factoring in that compensation for stack.
Use this calculator https://www.calculator.net/right-triangle-calculator.html?av=25&alphav=65&alphaunit=d&bv=&betav=&betaunit=d&cv=&hv=&areav=&perimeterv=&x=77&y=14