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Did you measure your RAD using the “hold a pen in your hand and mark the wall” technique, or just calculate it using his formula? I’m not sure if I’m a RAD believer or not yet, but I did make my most recent purchase based on it. My RAD measurements showed my old bike was a bit small, which echoed my personal feelings on it. So I tried to buy a bike closer to my RAD, so I guess we will see how it works out
. To the OP, I’ve got the RAD calcs for the prime in both the L and XL. But remember that the RAD is from handlebars to center of BB, so stem, handlebars, and stem spacers change it.
I’m 6’1”, and recently bought a size L Titan. No seat time on it yet though (still waiting for a few pets to arrive on Monday… like the IS brake mount). The Titan is larger in size large than the Prime by a bit though
I can post a screenshot of it later when I’m at the computer.
The only photo I've got of what looks even close to a complete bike. I just couldn't wait to start installing stuff, even if I didn't have all the parts here yet. The raw finish is quite beautiful, unlike the garage.
Tonight I finally finished the ridewrap (gotta preserve that raw lustre as long as possible right
), the cables are now routed with damping foam. I just need the chainring, dropper lever, and rear IS brake mount to arrive, so I can finish up the dropper post install, and trim the rear brake hose to length, and get a chain on there. After that, we're close to ready.
And here is a screenshot of the Titan and Prime in my bike nerd spreadsheet. Each are using the same theoretical 50mm stem, and 25mm riser bar, with 0 stem spacers under it. The Titan is 4mm larger in Span (Hypotenuse of Reach and Stack) / RAD (basically Span + handlebar/stem/spacer adjustments), and 20mm longer wheelbase for each size than the Prime.
And... apparently I forgot to change the XL Titan chainstays back to the compact ones, after I was playing around to see how that changed the F/R balance. Oh well, its probably close enough
.I just wanted to comment as it might (or might not) help the OP in his/her decision. I've been going through the same thing but between Medium and Large. You guys bring it up but I want to emphasize it, body type. So I'm plagued with an inseam of over 34 inches and I'm just at 5'10" / 178cm. My wing span is ~175cm. My gut had been telling me large as that's what I've always done historically. This past year I got back into MTBing after a HUGE sabbatical. And now the reach #s are vastly longer which I think now gives me the option to go to the smaller of the two sizes. If I had a longer wingspan and/or torso I might be looking at up-sizing. So to summarize my THINKING, if you're body neutral or ape+, you can consider going bigger. If you're longer in legs and/or maybe Ape minus, consider going down and running longer stem etc.
I was initially going for a PhantomV3 and quite possibly Large. But found the Prime Medium fits a bit better (longer reach vs Phantom Medium and of course more stack height with the more travel, etc.). Banshee (and @Cary) recommended I go Medium and strictly raising the stack height with riser bar / avoid using headset spacers in an effort to preserve reach. I am going with their advice and am going to give it a shot. If it doesn't work out...all good. Had the honor of building a sweet bike and I'll have to search for a worthy rider to be the next owner
@Blatant appreciate you commenting on the RAD thing!! I actually subscribed to Lee's site so I could access the bikelogic fit calculator thing. Looking at my RAD angle it appears all my previous MTBs are aggressive Time Trial / Triathlon bikes, lol.. 54-55 degrees. Whereas he's recommending 57 degrees for a trail bike. Body type, it's a bit deal. I think the RAD minus and plus recommendations etc totally depend on your body type (i.e. all legs or upper torso/wingspan, etc). You nailed it.
-=terry
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