Good luck with the gears. For reference when I stated the ~4mph difference you would note, I made the following assumptions, correct or not:
700x44c 175mm cranks mph@90rpm 38 and 44 front ring 11 rear sprocket Regarding cranks, sounds like you do have the Silver 24/38 with guard, so yes would need a new guard if increased ring size to 42t or 44t and Riv sells theirs up to 42t. Else, could get a 110bcd guard in 44t max likely elsewhere, but likely would be black. I am not a fan of spreading my big and small rings too wide, so if in your position I would consider new small, big, bash if you need the top end. -Justus Mpls, MN On Tuesday, March 25, 2025 at 6:02:37 PM UTC-5 [email protected] wrote: > Thanks for the replies and the explanations for the layman! Crank arms are > 173mm. > > I will spend some time with the Sheldon Brown calculator. I have been > trying to wrap my head around the info on the page on the Riv site but > somehow how it's still confusing to me. > > Jeff > > On Tuesday, March 25, 2025 at 6:55:18 PM UTC-4 [email protected] > wrote: > >> Hi Jeff, >> >> I have the same gearing on my Homer (650B), I use Sheldon Browns Gear >> Inch calculator (https://www.sheldonbrown.com/gear-calc.html). >> >> The highest being 89.8 gear inches (38x11) , bumping it up to 42x11 you >> would get 99.3 gear inches. >> >> What does that mean....i think you would get that sweet spot in higher >> speed, i also have the silver 2 crankset, you can just get the 42 tooth >> ring, you would still keep the chain guard too. >> >> I don't recommend you go higher than 42, as an 18 tooth jump for your >> front derailleur (42 to 24) is prob stretching it, doable, but stretching >> it. >> >> I say go for it! >> >> On Tuesday, March 25, 2025 at 3:37:48 PM UTC-7 [email protected] >> wrote: >> >>> I know this topic is addressed in countless ways online, so I'm looking >>> for more of a real-life take on the concept of gear inches. >>> >>> I'm running the wide/low double 38x24 (with guard) and an 11-34 on the >>> rear but feel like I am spinning out at the top end of the range on my >>> Hillborne. I'm a heavy guy, riding a big heavy bike and, momentum being >>> what it is, I can get up to a decent clip on flats and downhills. My Wahoo >>> trainer has an 11-28 installed and even when grinding up a 10-12% grade in >>> Watopia, I never use my 24 up front. I occasionally use it on the road, but >>> mostly stay in the big ring...34 seems plenty low for me. >>> >>> I think I might enjoy having a bigger gear up front but am not sure how >>> much of a difference it would make. I have a reasonable sense of what rear >>> cluster gearing means, but less so up front. >>> >>> Is there any way to quantify or assess or describe what might be gained >>> by going to a 42 or 44 over the 38? Can I just swap in the larger gear or >>> will I lose the guard? >>> >>> Thanks to anyone who has read this far! >>> >> -- 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 visit https://groups.google.com/d/msgid/rbw-owners-bunch/ecec1236-38fe-4bad-9c08-b545d245bb88n%40googlegroups.com.
