Steve, Thanks for the info. I guess if I go back to a triple, the granny gear would be nice. A 10 speed 12-30 with 24-34-44 seems to have a decent range.
http://www.gear-calculator.com/?GR=DERS&KB=24,34,44&RZ=12,13,14,15,17,19,21,24,27,30&UF=2200&TF=90&SL=2.6&UN=MPH I'll keep playing with this and with whoever does the build to make sure it can all work together. Thanks. Tim On Sun, May 29, 2016 at 7:28 PM, Steve Palincsar <[email protected]> wrote: > 10 tooth differences are great. Crossing over from the large to the > smaller, either you are in a hurry to get your shift completed, so you > upshift once in back and you're at the next step down, or if you're not in > a hurry, you make the shift and wait one or two heartbeats and you've > slowed down just enough so your cadence is in the correct range and you're > at the next step down. Where they don't offer as much as the wider spaced > rings is in the maximum range. But if your lowest gears are low enough for > your strength and riding territory, they're a whole lot more pleasant to > live with in day to day use. > > The way I use mine (36/46 or 36/48 with a 24 or 26T granny) I'm on the big > ring 90% of the time. I stay on the big ring until I need lower than > around 50 inches, and then cross over. I'm not a fan of small chain rings > and tiny sprockets as a way to get reasonable cruising gears. I'd rather > put my 65-75 inch gears on the big ring and the middle of the cassette. > I'm also a big fan of Sheldon's 13-30 9 speed cassette. Depending on the > wheel size, 46 or 48 x 13 gives me a top gear between 95 and 100 inches, > which is just right for me. It's a high gear I'll use on every ride, and > on the short rollers where I ride I have no need for a top gear higher than > 100. I'm not sprinting and I don't pedal down long mountain descents. > (Me, it's like dropping a piano off the Chrysler Building, look out, boys!) > > But, it all has to work for you, in the terrain you ride in. > > > On 05/29/2016 09:21 PM, Tim Butterfield wrote: > > Steve, > Thanks for the reality check. I did a different check and agree, 4mph is > a bit too slow at 90 cadence. :) I found another neat, sharable tool. > What do you think of this combination? > > > http://www.gear-calculator.com/?GR=DERS&KB=36,46&RZ=11,12,13,15,17,19,22,25,28,32&UF=2200&TF=90&SL=2.6&UN=MPH > > The 36t ring should be all I need for a while. Maybe some day I'll > graduate to the 46t ring. The 34-50 might be possible, but the 36-46 seems > a better fit. > > Tim > > > > On Sun, May 29, 2016 at 4:17 AM, Steve Palincsar <[email protected]> wrote: > >> >> On 05/29/2016 05:15 AM, Tim Butterfield wrote: >> >> Building further on the 2x10 possibility, I did some further playing with >> Sheldon's gear inch calculator. If I could pair the Sugino XD2 26t-40t >> crank with the Praxis 11-40 10 speed cassette, that would provide a range >> of 26x40=17.6 up to 40x11=98.2. From 17.6 to 98.2 is quite a range of >> gear inches. I not sure if I would use either extreme, but they might come >> in handy if I ever needed it, especially if I put a decent sized bag on the >> back rack. For a weak rider that might have a mix of flats and hills, what >> would you think of that range? >> >> >> It's not just the range. Here's your proposed gearing (if not the exact >> cassette, close to it): >> >> 63.8 98.2 >> 54.0 83.1 >> 46.8 72.0 >> 41.3 63.5 >> 36.9 56.8 >> 33.4 51.4 >> 29.2 45.0 >> 25.1 38.6 >> 21.9 33.8 >> 19.5 30.0 >> 17.6 27.0 >> A good general rule is you want your main cruising gear, the one you use >> for level ground w/o winds helping or hindering, to be in the middle of the >> cassette. Here you are on the 3rd position. Going up has one moderate >> step and one pretty large one. Going down, you have plenty - enough so >> that for anything but seriously hilly country you need never go to the >> small ring. But when you do, look at what happens: you drop so much >> you'll feel as though you dropped the chain, and will have to immediately >> upshift two to four times to get to the "next lower" gear, depending on >> where you are on the cassette. That can be hard to live with. Also, 17.6 >> is exceptionally low. Most people only have a use for a gear that low in >> the most severe terrain when they are carrying loaded panniers front and >> rear. >> >> >> -- >> 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 post to this group, send email to <[email protected]> >> [email protected]. >> Visit this group at https://groups.google.com/group/rbw-owners-bunch. >> For more options, visit https://groups.google.com/d/optout. >> > > -- > 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 post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/rbw-owners-bunch. > For more options, visit https://groups.google.com/d/optout. > > > -- > 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 post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/rbw-owners-bunch. > For more options, visit https://groups.google.com/d/optout. > -- 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 post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
