My experience with double FD's is that they are incredibly adaptable with capacities far beyond the manufacturers self-imposed specs and guidelines. The apparent raves about the CX70 I take with a grain of salt as there are endless other double FD's that work just as well. I'm currently using a Tiagra 4400 9-speed double FD with 44/36/24 rings (9-sp chain, Andel triple crank) and it shifts as well as I could ask for. That's even using a 44t ring intended for small/middle use mounted backwards, as the big ring. The specs of the FD say it's 2(larger) road rings, the specs say it only has so much capacity between the rings. How about what the specs don't say, or can't say ? What specs don't/can't mention is the infinitude of settings and usefulness. What they cannot express is the unlimited/inherent creativity that lies within.
By the way, about comparing wide/low doubles and triple cranks..... 3 rings offers the ability to run either large ring with the cassette. Even if some gears appear to overlap per ring that's okay as that offers the ability to use different cogs in the back rather the same cog all the time with a single ring alone. It also offers larger up/down shifts just by changing rings rather than by just cog shifts. So while a wide/low crank sounds okay in talking about it, I won't be riding one anytime soon with the hilly terrain I live in where I use 36,44,46 rings and cogs from 14 to 32 teeth daily. Also, the 152mm Andel triple crank I run is a black powdercoat finish. Andel makes it in silver also , but I've grown to like the hearty finish. It's very scratch resistant and easy to clean if need be. It's also notably stiffer/straighter than a Sugino XD type crank of which I've used 5 of. The XD is another of those online rider "favorites" that in my experiences is the least favorite of all. The hidden/backwards bolt only adds to it's demerits. Andel is a fine crank manufacturer, I wish their extensive crank selection was more easily accessible in the US market. The Riv Silver crank is made by Andel, btw. I've grown to like some black finished parts. At this point anything but the frame I'm okay with in given circumstances. On Tuesday, May 11, 2021 at 3:26:07 AM UTC-4 Ed Carolipio wrote: > Hi Doug, is your Claris triple specific? If it's not, that may account for > the rough shifts. Triple FDs have an inner plate that is taller than the > outer one. The CX70 is spec'ced for a double crank (46T top gear, 16T > outer-to-inner difference) may have problems with the triple as well. > > I've used a Claris double with a VO 46/30 and a Sugino 42/26 in friction, > and it worked well for both. Currently on my MIT Hillsen I'm running a > Silver 46-34-24 with a Deore FD-M591 (the 3x9 version), a 9-speed rear, and > Silver1 shifter. The M591 is matched almost perfectly with that crankset > and gearing: 48T top gear, 12T outer-to-mid difference, 22T outer-to-inner > difference. Front shifts are like butter with this setup. > > (BTW the crank is a Silver low-low double with a Sugino 46T chainring > replacing the guard. I didn't want to wait for a Silver triple...) > > The Claris triple (FD-R2030) will work but is less ideal: 50T top gear, > 11T outer-to-mid difference, 20T outer-to-inner difference. Better for > something like a 48-38-28 crank but will likely be made to work with your > 46-36-24. > > Good luck, > Ed C. > On Monday, May 10, 2021 at 8:44:40 PM UTC-7 Doug Williams wrote: > >> I have a Hilsen with 28.6mm seat tube and it looks like there is already >> a shim on there to mount my derailer, a clamp on Shimano Claris Triple. The >> shim seems to make it about 32mm. So if I replace this derailer, would a >> 31.8/28.6 clamp on be correct? >> >> I found a bottom pull Shimano CX70 in that size that looks nice. Everyone >> raves about the CX70 so I wonder if it would be better than my Claris? The >> Claris basically works, but it is not exactly smooth. I am currently >> running the Sugino Triple Crank 46-36-24 but I might switch to the Rene >> Herse 42-26 or wait for Riv's Silver Triple 44-34-24 to be back in stock. >> In any event, when this set of chain rings wears out, I am done with the >> Sugino hidden bolt. I just stripped the bitch and had to drill it out, so >> I'm done with hidden bolts. >> >> So...would the CX70 work with both double and triple 8 speed friction >> only (Silver Bar End) shifters? Or is it only going to work with a double? >> Would the CX70 be better than the Claris? >> >> Doug >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> -- 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/dc1cb0dd-c897-46bd-a95b-62c153d17994n%40googlegroups.com.
