Patrick, The Jones frame is made with a Boost 148 rear spacing which calls for a 51-53mm chainline. What this does is move the cassette 3mm further away from center. This is done for better tire and FD clearance. When I was looking at Jones frames, I read all this and while on the surface it seems one would be limited to using boost specific cranks, the obvious question arises ..... what's the difference between a boost crank and it's 51-53mm chainline and running a triple crank with either just the outer ring as a 1x, as long as you're in the 51-53mm chainline range ? Or, use the triple as a 2x with the chainline measured between the rings, given the proper length spindle ? As far as the function, given the same chainlines, there is no difference, a 52mm chainline is a 52mm chainline. I see the potential issue though would be in using a road crank, to get the chainline out that far enough and the arms clearing the stays. This would require an appropriate length spindle, and if you're saying say, straight arm cranks, you may need a long-er spindle, which of course increases the tread width of the crank.
So the first thing to know is the width of the stays where the crank arms go. All that said, Shimano does make a 52mm chainline XTR crank with a 162mm tread width, but doesn't list an inside arm width. Otherwise there are lots of boost compatible cranks that are 168mm wide. https://bike.shimano.com/en-US/product/component/xtr-m9100/FC-M9100-1.html. I'm not sure how wide the Jones crank or how much clearance there is. Someone with a LWB would have to measure theirs. Also the White Industries Road.VBC crank w/121mm bb = 158mm tread width, 51.5mm chainline as a 1X, 47.5mm as a 2X. This might be too narrow to clear the stays though, see the specs, plus the measurement of the given frame. https://www.whiteind.com/product/square-taper-road-cranks/ https://www.whiteind.com/wp-content/uploads/2020/09/Squaretapercrankdimensionsimage.jpg All in all that's the first hurdle to clear, the chainstay width for the cranks. Then go from there. As for a new frame for Gregger, I can't say what would work for you as my perspective is inherently biased from my own sensibilities. On Saturday, February 24, 2024 at 11:29:27 PM UTC-5 Patrick Moore wrote: > This is very interesting; I thought all Riv models except the various road > models were "country bikes" but to hear the Gus compared to a Jones would > seem to be high praise, from what I read about the Jones (it's one of Bike > Snob's keepers in his current bike purge). > > I just gave away my sole mountain bike -- the much modified Monocog 29er > -- in favor of a fatter-tire second wheelset for my Matthews "road bike for > dirt," but I'll have to consider a Gus if I ever decide to get another > mtb. Question: Can you get a =/< 160 mm Q with a Gus? What kept me from > getting a Jones was the >160 mm Q. > > Patrick Moore, also closing in very rapidly on 69, in ABQ, NM. > > > On Sat, Feb 24, 2024 at 1:57 PM Richard Rose <rmro...@gmail.com> wrote: > >> I’ve not ridden a Platypus but I’ve yet to hear it described as a trail >> bike. Love, love, love my Clem on & off road but if things get dicey it’s a >> bit overwhelmed with the lower bottom bracket - compared to my Gus. The Gus >> or the new Susie (get one! Run do not walk!) are singletrack machines. Yes >> they are good for other duties as well but are conceived & built to be >> mountain bikes. I am blown away by it on rough, rooty & slightly rocky >> singletrack. It is every bit the mountain bike that a Jones is (I had one) >> which is of course highly regarded in that category. I’ve yet to experience >> a pedal strike on the Gus. I’ve had quite a few on the Clem. And I am >> pretty decent at avoiding them if I do say so. So, IMHO if what you are >> looking for is a singletrack bike get the new Susie or try to find a >> leftover one/Gus. >> FWIW, I am closing on 69 years old & have ditched my full suspension bike >> in favor of the Gus. As you allude to, I am a bit less aggressive on the >> Gus vs. the Ibis. I think that’s is smarter at my age. No less fun though.:) >> Sent from my iPhone >> > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/adeeec00-a016-4f5d-b39d-5ed2f56bdafcn%40googlegroups.com.
