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Looking at the rim brake Speedmax CF. Can you offer fit assistance for:
Pad Stack = 750
Center of Pad Reach = 500
I'm 6'4" with long legs, FYI.
Thanks!
nmurray,
The Canyon Speedmax CF rim brake bike won't immediately arrive at your position without some help. Here's how you do this.... You get an XL. It's gonna come with 90mm Canyon stem that is -6 degree in pitch. Pull that off and put on a 90mm stem that is +8 degree in pitch. Use a Profile-Design or Ritchey or what ever you like. It'll be easy to find because the steer tube is standard 1 1/8in and the base bar is standard 31.8 so they are everywhere. The +8 and the spacers will get you up to the Pad Y of 750 (the max with the stock stem is 721). Then you'll want to pull the pads back pretty much 100% (the min Pad X is 508 but because we're now climber higher on the 73 degree head angle the pads are creeping back to you and you'll be at 500).
Ian
Thanks! How many spacers would that require?
Also, could I impose on you to offer your opinion on and perhaps another fit prescription using a +17 degree stem (specifically PD's to use with the Aeria Hydration system)? Could I use that stem and fit on the L? Does that angle take the pad stack too high? I like the narrative of and look of turning this into a "super bike." Please let me know if this is more a question to take over to the PD bar official fit assistance forum.
nmurray,
I don't like plus stems. It's not just an aesthetic thing for me, there's an aspect of stability of safety involved as well. They aren't unsafe but they are NOT preferred. I prescribed a +8 stem, and, to answer your first question directly - all the spacers that come with the bike (this is ~35mm) to get you up to that Pad Y of 750- and I want to come back to that number in a moment.
Now, to the other question - what would the prescription be with a +17 stem. If you were in a post apocalyptic setting and had to get across some stretch of desert highway to get to water, and all you had was a +17 stem then you could get the pads to the same spot with 20mm of spacer you'd arrive at nearly the exact same spot. BUT hold the phone... you asked this because you're attracted to superbike aspect of a front end hydration system - specifically the Profile-Design Aeria Ultimate. I know a bit about that as
HERE is my bike. The PD Aeria Ultimate Hydration system ONLY plugs into their Aeria Ultimate stem and that stem, while a bit of an odd ball, is a hella lot closer to a -17 degree stem than a +17 degree stem. It would not be possible for you to get a enough spacers under a -17 degree stem to get the pads up to 750.
So, can we discuss that 750? You're 6'4" I would expect your Pad Y to be 695ish, with long legs/short torso then I'd expect 715-720. There must be another reason that your at 750. It could be something physical: many fused lumbar vertebrae, a large belly (from cyst/benign tumor/too many Uncle Eddies vegan peanut butter chocolate chip cookies), etc. It could be something in the process: these numbers came off a road bike with clip on aerobars, or the cranks 172.5 or longer, or it's a tri bike but riding with hips too far behind saddle from... old style roadie saddle, or on a good saddle but riding it too far back, or maybe the bike was never offered to you in a lower/longer position. And, please understand, my priority is always comfort. When I suggest your Pad Y/X would be 715/520 I'm not saying that because my priority is aero. That 750 is just so unusual - look at this article;
https://www.slowtwitch.com/.../Orthodoxy_6670.html So, if your Pad Y really is 750 - it can be created on the bike we're discussing (Speedmax rim brake CF) with a 90mm, +8 stem and 35mm of spacer. BUT I'd sure like to hear from you about that 750. The funny thing is, if we discuss it here (and I'd love to) and we come to figure out that your real Pad Y is 718 - the bike is still probably the XL (could be a large) but now with the stem that comes on it or maybe even then we can discuss making the PD Aeria Ultimate hydration system work.
Let me know, Ian
Ian Murray
http://www.TriathlonTrainingSeries.com I like the pursuit of mastery
Twitter - @TriCoachIan