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I am not sure I fancy cleaning the muck out of the hubs though
Out of interest what is the rough weight for the frame? Also, how does the lower end of the shock mount to the frame? Do you have any pictures for this?
@DanW: The hubs actually don't get much dirt inside them, I think because centrifugal force wants stuff to move outwards in radius more than inwards. Being in dry colorado probably helps; I imagine the conditions in Wales are somewhat muckier generally!
Frame weight without the shock is about 1.85kg / 4.1lbs (including seat binder bolt and derailleur hanger). Shock and mounting hardware adds about 270g, so total is around 2.12kg or 4.7lbs. This is a bit heavier than they used to be because the post-mount brake and thru-axle rear dropouts from Paragon are both a fair bit heavier than their IS / QR alternatives. But I consider those to be pretty functional changes and worth any weight penalty. (Plus I added the integrated seat binder rather than using a seat collar)
The base of the shock attaches to the frame via a cylindrical aluminum adaptor that is clamped by the collar at the end of the seatstays. Rus Kappius and I actually modified the design a little bit so that the adaptor is bolted onto the shock before being clamped (and did some nice machining / anodizing to match the hubs). Here's a photo:
Out of interest, why is the lower shock mount designed like this rather than a pivot and bushings more like the upper mount? Is extra stiffness needed in this area?
I have always thought a Ti full sus frame needs to use the properties of Ti in some way to add to the function of the frame rather than just be a flexier or heavier more expensive Alu copy- the lower flex plate is a perfect example of using the material to add something to the function. The cleanliness and ease of maintenance of this design really appeals to me stuck in the British mud pretty much year round
I totally agree about using the properties of Ti to the bike's advantage, and this is one thing that made me fall in love with the design of this frame. That and the fact that its just so simple and clean. As to the reason for the design on the lower mount... if they used a pivot and bushings here then (without a linkage setup) it'd add more degrees of freedom that aren't needed and probably aren't wanted. I know that they've often been asked why they don't have a linkage setup there like all the other full-susp frames, and the answer is that they did, but that they took it out of the design because they felt it added weight and complication and rode just as well without it. Honestly, I can't say enough good things about this frame; definitely worth considering if you're in the market for something like this.
How are the hubs working out for you? If I am not mistaken they should feature ultra fast engagement right?
Check it out: the most amazing vintage Colnago, Merckx and Pinarello collection
1) The bearings felt pretty tight, and I fancied some bling, so I replaced the cups&bearings with Zipp Vuma Ceramic (unbelievably smooth bearings) which have the exact same dimensions, but somehow weighed 20g less (happy coincidence)
2) I didn't like that the dust shields sat 1.5mm+ away from the bearing face (and a bit beyond the cup outer edge) because I felt that dust and dirt would easily find its way into the space. So I ground down the lip on the shield by 1mm, leaving behind a 0.5mm lip, and the dust shield now sits "within" the cup rather than protruding.
3) I didn't want to use all the delrin spacers because it seemed too ugly for this build (they'd be visible on the NDS), so I figured out that with my thinner dust covers, my NDS spacer needed to be 9mm to center the cranks, took a 10mm 1 1/8" carbon headset spacer and machined it down to 9mm thickness and from 28.6mm ID to 30.0mm ID. On the DS I needed only one 1mm spacer plus the wave washer.
The nice thing about the SISL2 in this setup is that the Q-factor is I think 5mm (or was it 2.5mm?) narrower than with the SISL because the arms are a slightly different shape.
Perhaps the chain stays could be made shorter by bending the seattube?
Another solution to advance the seattube to the front from 2soulscycles (and easy acces for a stealth dropper post)It's a hardtail, but even a fully could benefit from shorter cs imo:
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