Patrick, I belive this has been pondered before with other Susie owners and I'm pretty sure 2.8 is the max for the rear while the front could take a 3.0. 80mm, would be a bit too wide. Suggestion!?! Contact Grant if you have not already. He would be able to tell you even "if" it were feasable given the chainline issues with tires over 2.8", and "if" it were "would" he even give the okay to have one made and sold to you as a "Rivendell" branded product. "If" he did ..... "then" you may wonder ... "why not disc brakes too" ? ...... and that's where it all goes kaput ! ... das ist kaput !!! (((( laughing ))). Even so, the very widest rim brake rim I know of is a Ryde Andra 29.29ID/35OD and a cool 995 grams ! Not for the weight weenie.
You know though .... when it comes to float, good float ..... forget about that 80mm ! How wide is "wide enough" ? 4" , 5 ", 10" ? Hah ... even enough never seems enough does it ? There's always that nagging "what would a little more feel like" ? Even that would never be enough 'till you take full flight, as that is our Nature ..... Boundlessless, The Infinite ! If We were not already So, we could not even play a finite game of "follow the trails". Whatever "the situation" ... a good laugh is always in order. Like riding a road bike through the sand and sinking over the rims...... oops ! Riding a road bike a on a mtb trail .... Hi-Yo Silver ! No joke ! My Franklin custom is the best handling offroad/trail bike I've ever ridden. It's as-if I've played "let's box myself into wider tires are better" ! Better than what ? When ? How ? Where ? For Who ? An honest inquisition reveals but a circle of relatives all leading to where it begins and ends, all-at-once. How facinating ! On Wednesday, May 25, 2022 at 1:28:49 AM UTC-4 Erik wrote: > Well, that sand looks brutal! As you noted, the max listed tire size on > the Gus or Susie is 2.8, but I feel like that would be pushing it for a > couple of reasons. I'm running 29" x 2.5 Terravail Ehlines. They measure > about 62mm without any weight on them on Cliffhanger rims, tubeless. They > have plenty of clearance on the sides (about 12mm on the front, a little > less in the rear). I measured the distance between the inside of the > chainstays and it looks like it's right about 80mm (I wasn't measuring with > calipers!), so I don't think you could fit 3" tires (about 76mm) with any > meaningful room to spare. The forks have a little more clearance so maybe > a slightly larger front tire would be possible. > > The bigger issue that I would see with trying to get even larger tires on > the back is the bottom bracket width necessary to keep the chain off of the > tire. It would push the chainline out pretty far. It's a 73mm shell and > I'm running a 122 IRD bottom bracket with spacers. Even with that and a > chainline that is waaaay outboard, the chain runs pretty close to the tire > in the 50t gear in the back. I think that if I sized up even to the 2.8 I > might have to switch up to a 127 BB, pushing the chainline out even > further. You almost need Boost spacing at that point to push the cassette > further out in line with the front chainring. Otherwise the front > chainring is starting to line up with the smallest cog which makes for a > terrible chainline. That's my amateur opinion at any rate! I'm sure > someone on here has tried it or knows this better than I do. > > Otherwise, even with "just" 2.5 inch tires it's handled the terrain just > fine and was easy to keep on track on multiple surfaces, including rocky > sections and sections with lots of roots and loose gravel. It was equally > fine with all of it. Sand, however, is another matter. We don't have much > of that on the trails in my area so I can't really speak to it. > > I may try out a larger front tire soon and will happily report back. I > don't think I'm going to try a larger rear tire for the reasons above re: > chainline. > > And thanks for the nod on the build! Happy with all the shiny bits. > > Erik > >> >> >> -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/7da3ff67-37a9-4ea3-ae97-66e728cefa60n%40googlegroups.com.
