Originally Posted by
Andrew R Stewart
Everyone rides differently and has their own way of doing the bike thing. I suspect you're dealing either with a travel bike or a recumbent. Is this correct? I run pretty low gearing on my own bikes, triples (with one exception that's being replaced soon) but 26" tires are the smallest with ders, my 20" is an IGH.
Hopefully a spoke protector will do the job well enough. Andy
She's riding a recumbent tadpole trike with 3 20" wheels.
Originally Posted by
tomtomtom123
What's the chain wrap? If it's 22t jump in front and 11-36 in back, then wouldn't your 47t capacity Rd work fine through the entire range as long as you have the right chain length? That would be exactly 47t chain wrap.
Assuming 24/46t in front would give you 627% gear range, which is huuuuuuuuuuge. On 19.8 inch tire would give 13.2-82.8 gear inches.
SGS long cage is a bit long for 20 inch wheels. I use rs-4700-gs with 41t capacity with 43t chain wrap with 34t cog. The pulley is dragging on the 2 smallest cogs.I have only a few millimeters inside the 406 rim of ground clearance.
Right now, it's an 11-36T cassette with a 24-38-52 set of chainrings. I suspect in the long run she's going to end up with a 18-33-48 set of chainrings and the same cassette. 10 gear inches or just below is completely normal territory for a trike touring in the mountains.
I have a Hebe spoke protector which says it's for 36t. $3. Hooks behind the spoke flange with 3 tabs.
Hebie Spoke Protection Disc 1040 M5
It's a 32-spoke wheel.