Looks like Grant made a math error towards the bottom, 22 + 21 = 43, not 44.
"Big chainring 46. Small 24. That diff is 22. Big cassette tooth 32, small 11, that’s 21t The 44t diff exceeds by a tooth, but two things here: One, I bet Shimano gives you a tooth to work with, and the bigger TWO, the wrap capacity assumes you’ll be riding on the 24t x 11t combination, which of course you shouldn’t. That’s the one that requires 44t of wrap. You should use the small chainring only with the biggest four or five rear cogs, in which case the 43t wrapacity is way more than enough." Maybe he did it on purpose to make the point that Shimano is very conservative in their ratings? On Fri, Apr 25, 2014 at 8:04 PM, Jim Bronson <[email protected]> wrote: > I thought they should have gotten the M370 Altus which indexes 9 speed > and looks somewhat normal: > > http://www.ebikestop.com/shimano_altus_m370_9_speed_rear_derailleur_silver-RD0001.php > > But I do like the fact that the Altus uses the bigger wheels rather than a > longer cage to accommodate larger cogs or really, wrap more chain. It's an > aesthetically pleasing approach. I'm sure the novel approach to achieve > the same end and at a low price point was an appealing opportunity for > Grant to drop some knowledge. > > Now, if someone would just make a beautiful shiny cheap derailer, that > would really be something to trumpet. Is it so expensive to make things in > super shiny polished silver? > > > On Fri, Apr 25, 2014 at 6:09 PM, Bill Lindsay <[email protected]> wrote: > >> I love the BLUG post on cheap derailers. Especially when you are using >> friction shifting, your derailer doesn't do much of anything. It makes so >> much sense to use cheap ones. Cyclists tend to brag about what they can >> break when they abuse the crap out of their equipment. There's a lot less >> bragging about how much use you can squeeze out of inexpensive equipment by >> not abusing it. I'm tempted to run that $24 Altus on my 2x9 Hillborne. >> >> http://www.rivbike.com/product-p/d17.htm >> >> Ultra cheap front derailers can be awesome as well. Front hubs are also >> a dime a dozen. >> >> -- >> 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 http://groups.google.com/group/rbw-owners-bunch. >> For more options, visit https://groups.google.com/d/optout. >> > > > > -- > Keep the metal side up and the rubber side down! > -- Keep the metal side up and the rubber side down! -- 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 http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
