Jur, your the man!!): thank you again!!
and the vuelta is the one I will be ordering
Is 16 really the smallest ss you can get?
I would have thought a 14 or even a twelve was something that can be obtained...
yeah, that is what I thought too, turns out shimano 16 tooth is the only readily smallest available, there is also a 15 tooth by ac racing that is sometimes/or not available, and when you can get it pricey compared to shimano
also it is cheaper to buy just a (1) 60 tooth ring (I have a 16 tooth shimano) than to buy 2 things plus shipping = 15 tooth at Harris and a 56,58 or 60 tooth chainring at another place and
Just one thing, I think. The 15 with your present chainwheel will give you about the same gear as increasing the chainwheel, plus it should be slightly lighter and more compact, and also you would still be able to use your present chain - so actually less things!
Hey werewolf, maybe I am wrong, but I worked it out to
currently I have
52 x 15 on 406 wheels=64.8 gear inches
60 x 16 on 406=70.1 gear inches
64 is too low
I can live with 70
my sweet spot is 72 but with the small wheels no can do
so buying a 15 =30plus dollars and I would also have to buy a 56 or 58 ring another 40 dollars
am I not seeing this right???
simplest, easiest, cheapest just the one 60 tooth ring..maybe weigh an ounce more
also I have over 20 boxes of new sram chains with powerlink so no probs with chains(picked them up at performance durung year end sale plus another 10 off and another 10 percent off plus member points) came out to about 4.oo a chain so I loaded up
also too late to do anything anyway..I ordered the new ring wednsday
oh also to the above post...moulton's are 16", pashley moulton tsr 20"
I was using sheldon's calculator, I was usning another one and came out with different figures too
that is one difference, you said you ordered custom from Peter, that is why you got a 56, mine came with the stock 52
as far as the 406 as 20 I don't know, I am new to all these smaller tires
20" tires come in 2 flavors. The 451 size is a taller and skinnier version of the BMX (406) size. Tires and rims are not interchangeable. The 451 size is usually lighter and faster. The wider BMX size is more designed for touring and commuting.
OK, I did a rough measurement. Yeah, rim to rim is about 16", ie about 406 mm, and tire edge to tire edge (Schwalbe Marathon tires) is about 19", just like Peter said. So then, a 16"/406mm wheel is called a 20" wheel? Why? Car tire sizes are even more confusing! Anyway, I was calculating gear size for 19" diameter tires, so the gear sizes I noted above are correct, for my bike.
Jur, you must have narrower tires than mine that you are measuring.