BTW, I will not criticize anyone who wants to put a 32 X 10-50 on a road bike; do whatever is the most fun. I certainly have some weird drivetrains. But I thought someone ought to point out that perhaps you don't need such a high high or low low for such a bike, and that you might want smaller than 10" jumps between the most common cruising gears.
On Thu, May 14, 2020 at 3:58 PM Patrick Moore <bertin...@gmail.com> wrote: > I'm curious why you need a 46 or 42 t cog on a bike built to be a fast > road bike, especially in DC (I lived and rode there). I would think you'd > sorely miss closer ratios in the middle gears, no? The first 11 sp cassette > meant for a single ring that I could find was this one for a 42 t ring: > 10,12,14,16,18,21,24,28,32,36,42 > > That's a drop from 84" 74" to 65" to 56" which would be fine on a mountain > bike for steep singletrack, but IMO, deadly on a road bike (I'm assuming a > 28" diameter wheel for a true 35 mm tire, but the gaps would be very > similar for skinnier tires.) > > Actually, the jumps aren't as big as I had feared, but they're still > pretty big for a fast road bike. > > And that's a 117" high, which IMO is pretty high even for a fast road bike > unless you are racing. > > Even if you will be carrying heavy-ish loads* into headwinds up the hills > I am familiar with in NW Washington, I can't see needing anything lower > than say a gear in the 40s; let's say 40". I'm not familiar with 1X > drivetrains, but to take my dirt road-road bike as an example, if you have > a 42 t ring and 32 mm tires, that would mean a cog of about 30 t: 42/30 X > 28" wheel = 39". That's a lot lower than I use for everyday riding in > rolling terrain even with grocery loads on my road bike, and I'm 65 and > hardly super fit. Now a long ride for me is 40 miles (it is indeed up from > 30!), but at least for that distance, in merely rolling terrain without a > heavy load, I can't see using anything below 40 gi -- I can't see using > even that, frankly. My dirt road bike bottoms out at 50" in the 42 ring, > and at 33" in the 28 t ring (25 t cog). > > My road bike for dirt roads is set up as a 1X 10 with bailout ring (42/28 > X 13-25 10 speed) and while I realize most people aren't as fussy as I > about close gaps in the middle range, I can't imagine > > > > * Since my errand road bike is unavailable, I've been using my gofast road > bike for carrying groceries; 20.32 lb exactly today in a Camper Longflap on > the Joe Starck custom, 76" fixed gear, no hills but certainly a headwind. > > On Thu, May 14, 2020 at 1:27 PM Robert Gardner < > robert.harris.gard...@gmail.com> wrote: > >> Hi folks -- >> >> I am retooling my drive train on my Roadini -- this will be my "fast >> bike" and potentially used in whatever we are calling rando rides these >> days (pending any actual group rides happening again). >> >> Looking for suggestions on a 1-11 drivetrain -- 11-46? 11-42? I'm in DC, >> so will be riding some hills, some flats, but nothing too crazy. Not sure >> if I'm going to go Herse or White Industries, so I'd love thoughts there as >> well. And, that little thing called a derailleur. I will be using a bar end >> shifter. >> >> I'm assuming you all have very definite thoughts, so please treat me >> kindly in this thread. >> >> A danke -- >> >> RGinDC >> >> -- >> 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/CAO1DKXvL9xtyduDmDGh%3DNmWiHmG_y__%2B2iXszxOf%2Br7OQKr84Q%40mail.gmail.com >> <https://groups.google.com/d/msgid/rbw-owners-bunch/CAO1DKXvL9xtyduDmDGh%3DNmWiHmG_y__%2B2iXszxOf%2Br7OQKr84Q%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > > > -- > > ----------------------------------------------------------------------- > Patrick Moore > Alburquerque, Nuevo Mexico, Etats Unis d'Amerique, Orbis Terrarum > > -- ----------------------------------------------------------------------- Patrick Moore Alburquerque, Nuevo Mexico, Etats Unis d'Amerique, Orbis Terrarum -- 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/CALuTfguBwPVqZRr3myw8mfZjVCDop%3DRXkH9VHC1CiHjm9AL4yA%40mail.gmail.com.
