Hi Team
Hope that you're all well (nerd alert on the below 😆).
Looking at a new previous generation (2021 - 2023) Cannondale Scalpel (full suspension) as my LBS can build one up for a great price. I plan on keeping this bike for a good while (3 years min) so want to get it right.
Use case will be XC marathon / stage races, gravel and non competitive trails.
I am 177cm tall, but with a long upper body so about a 180cm wingspan. 40 years old, reasonably fit and flexible / strong.
1) My current bike (Roscoe 7) is a Large with a Reach of 470mm, 770mm 25mm Rise Bars and 42.5mm Stem (effectively 512.5mm reach to bars yes?). Effective Top Tube is 646mm and Stack is 644mm. My saddle is probably 2/3rds forward on the rails.
I am finding that I have pressure on my hands when seated to the point that some of my fingers go numb after a few hours. I have also (for the first time) ever, found that my hands want to "blow off" the tops of my bars in the rough downhill stuff. It feels like the bike is too short for me, but surely it can't be. If you look at any manufacturer's recommended sizing I should be a Large. Brake lever angle, grips etc are all similar to what I've used in the past.
2) The "2021" Scalpel in a Large has a Reach of 455mm and I would fit a 60 / 70mm stem (effectively 515 / 520mm reach to bars?). ETT is 622mm and Stack is 601mm. Lower stack should increase my seated reach which should help with hand numbness (if my lower back can keep the weight off my hands with more "waist" bend. This is a very "traditional" sizing / cockpit build (relatively long stem etc).
2021 Scalpel in XL has a Reach of 475mm and I could fit a 40 / 50mm stem (effectively 525 / 535mm reach to bars?). ETT is 644mm and Stack is 610mm.
3) The brand new 2024 Scalpel in Large has a Reach of 475mm and looks like it comes with a very short (40mm?) stem (effectively 515 mm reach to bars?). ETT is 625mm and Stack is 607mm.
Comparing the 2021 XL and the 2024 L, apart from ETT on the 2021 being an inch longer, the old XL and the new L are very similar. Seat angle on the old bike is slacker than the new, so I would likely move my saddle forward of the midpoint anyway which would shorten my ETT for pedaling.
If I buy the 2021 XL, it may also allow me to fit a -1 degree angleset to slacken the head angle to a very modern 67 degrees (2024 bike has gone from 68 to 66.6 degrees).
Am I oversimplifying things or is there something to be said for going for the larger bike.
Lachlan Morton went from a medium Scalpel at the last Leadville 100 to an XL on the new 2024 Scalpel and was very happy with being more "in the bike" and the stability it brings.
Nerd rant off - any ideas?