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Well, they way I see it, you ain't got much to lose...
Or maybe you could try to stretch the spring a little, so it will put more force on the assembly
The 58 is huge though, do you need the extra toe clearance?
I calculated that with >620mm of BB to front axle I should be on the save side. Size 56 is actually perfect regarding body position (apart from the seatpost). My next concern is that I would like to fit my full frame bag into the triangle which would need min 45cm of vertical space. Too bad that many frames are having lower top tubes now. Nice, I tried to get them to do measurements with no luck. Yeah maybe the best option is to go for a nominally smaller tire with the really wide rimThey didn't answer your question? I actually asked two different contacts, because the first answer got stuck in my spam folder. The first answer was 60mm in fact. But this sounded a bit unrealistic for a 45mm frame set..
).
I pulled the trigger, and bought a Chameleon one in size 56. Really excited about it. Going to build it up with 11 sp mechanical Ultegra, and hoping to fit 50/34 chainrings on there. It's going to be my do-it-all bike with a road and a gravel wheelset.
Unfortunately, it won't show up for another 2 months(EU preorder for June 30).
A few things:
1) The reason it has similar geo to the BXT and Nextie, is that all 3 are very heavily "inspired" by the Scott Addict Gravel. That's also why I'm hoping 50/34 will fit, since that fits on the Scott.
2) When it comes to the setback, what matters is that we can achieve our preferred saddle position relative to the BB. This in turn can be determined from just 2 factors: The seat tube angle and the setback relative to the line through the bottom bracket. The reason the setback looks big is that the seat tube is shifted forward relative to the BB as seen by the blue line.
i) My current bike has a STA of 73.5 instead of 73 on the Graro. That results in shifting the saddle back roughly 5mm at my saddle height, relative to my current bike.
ii) My current bike has a setback of maybe 5mm, (round seatpost centered on the BB). This means another net 15-5 mm = 10mm setback.
iii) However, the clamp that holds the saddle rails is also much smaller on the Graro, which gives a bit of leeway the other way (roughly 7mm by my estimation).
I've concluded that I can easily achieve my current saddle position, even without slamming the saddle all the way forward.
Will definitely post a lot of measurements related to tire clearance, chainring clearance etc when I receive the frame!
)
Given a STA of 73, that results in a horizontal setback of 15.68. So not a big difference, assuming I got the trig right.
Eyeballing the drawing, we're losing another 10mm relative to the center of the seat tube though.
I noticed that the Nextie G2 has the exact same geometry: https://bikeinsights.com/compare?geometries=648f566fec82fc001a96df32,65c2a0c6a244e9001aeae09c,
except for 10mm longer chainstays.
No one caring about geo would buy this frame. Too bad since I really would have liked it.
Hmm. My experience is from BB30 but I am not alone. I have CAAD 10 and SSE2 both from 2014-15 timeframe. The CAAD came with squeaking bb when I bought it last year. Punched out the bearings and installed new (Wheels Manufacturing ABEC-5) and after a couple of months they started squeaking. I haven't changed it to thread together yet so I clean and lubricate every time squeaking returns. The SSE has Token thread together BB on it and it works fine. Its still technically press fit but I like the idea of two cups attaching to themselves than just latching onto frame.
The problem with BB30 and BB30a bb shells is there is no traditional bottom bracket as such - its just bearings pressed in and a c-ring prevents them from going all the way in. Those bearings, c-rings, and two cups/reducers to space out crankarms form a bottom bracket. If Loctite is used it will be around the bearings directly and if it bonds the bearings to frame, its frame dump the next time bearings need changing. Loctite is a big no there. Same thing with Trek's BB90.
When you say I use good quality BB with replaceable bearings, are you talking about BB386/PF30?
