presta
Legendary Member
No, the chain only wraps round half the sprocket, so if you add two teeth to it you need one more link. (One link being half an inch of chain.)
Gearing change and wheelbase on a Single Speed…..
- Thread starter sevenfourate
- Start date
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No, the chain only wraps round half the sprocket, so if you add two teeth to it you need one more link. (One link being half an inch of chain.)
Ajax Bay
Guru
- Location
- East Devon
They can't. The 11t sprocket (rear) is for keeps. Read the thread.
And a link is an inch long, btw, so IF the OP could go for 13t they'd need a half link.
presta
Legendary Member
1) If you change the size of a sprocket or chainring the chain length will change by half the amount that the circumference of the gear changes, and that's true regardless of how you choose to define 'one link'.
2) SRAM define their chains as 112 or 114 links, and I can assure you that their 114 link chains are 57" long, not 114".
3) In Standard Handbook of Chains, JL Wright refers to "inside and outside links", which only occur if a link is defined as the pitch between adjacent rollers/pins:
Ajax Bay
Guru
- Location
- East Devon
How lovely.
However, I can assure you that SRAM's soi-disant "114 link chains" are 56 and a 1/2" long, not 114".
Feel free to measure one.
Tell me, and particularly applicable on the assumption you've read this thread, how long is a "half link" and can you buy them?
Never heard of this Wright bloke: let's go for Sheldon Brown whom rather more have accessed for information:
"An old-style bicycle chain has ten parts per link. The typical 57-link chain used on the average multi-speed bike had 570 parts, more than the whole rest of the bicycle put together. There were 114 outer plates, 114 inner plates, 114 rollers, 114 link pins, and 114 bushings."
However, I can assure you that SRAM's soi-disant "114 link chains" are 56 and a 1/2" long, not 114".
Feel free to measure one.
Tell me, and particularly applicable on the assumption you've read this thread, how long is a "half link" and can you buy them?
Never heard of this Wright bloke: let's go for Sheldon Brown whom rather more have accessed for information:
"An old-style bicycle chain has ten parts per link. The typical 57-link chain used on the average multi-speed bike had 570 parts, more than the whole rest of the bicycle put together. There were 114 outer plates, 114 inner plates, 114 rollers, 114 link pins, and 114 bushings."
OP
OP
sevenfourate
Devotee of OCD
- Location
- Lowestoft, Suffolk
Done:
I reckon I got the rear axle within 2mm of where the previous position was; judging by the witness marks on the dropouts. Close enough 👌
That’s the good news 👍 Bad news is 5 teeth less on the front is surprisingly little noticed gearing wise 🤷♂️ And the full 1/2 link chain is pretty noisy…….
*I’d stripped the chain of factory oil / grease before fitting. So I’m hearing it bone dry. Hopefully my modern lube (Which normally quietens every drivetrain slightly) does its normal great job…..
I reckon I got the rear axle within 2mm of where the previous position was; judging by the witness marks on the dropouts. Close enough 👌
That’s the good news 👍 Bad news is 5 teeth less on the front is surprisingly little noticed gearing wise 🤷♂️ And the full 1/2 link chain is pretty noisy…….
*I’d stripped the chain of factory oil / grease before fitting. So I’m hearing it bone dry. Hopefully my modern lube (Which normally quietens every drivetrain slightly) does its normal great job…..
OP
OP
sevenfourate
Devotee of OCD
- Location
- Lowestoft, Suffolk
Congratulations for absorbing the small details 😁 Hope the Horizontal crank arms and equally angled pedals made you smile too 🤣
Ajax Bay
Guru
- Location
- East Devon
Well I think you may need to reconsider the pedal crank angle which looks like 90 to me.
Rule #26// Make your bike photogenic. When photographing your bike, gussy her up properly for the camera. Some parameters are firm: valve stems at 6 o’clock. Cranks never at 90 or 180 degrees. Others are at your discretion, though the accepted practices include putting the chain on the big dog, and no bidons in the cages.
For Facebook marketplace the correct protocol is to have a couple of wheelie bins in the background
Rather surprising that a gear drop 2.7 > 2.27 is barely noticed.
The spare bike I had to use last year has 52/16, it took me a couple weeks to train pushing harder, and vice versa, when main bike was repaired, it felt a couple weeks easy to push, the difference is 3.25 <> 2.94, same teeth count difference but percentual less than your change.
Out of curiosity to check the tables I found, did you count how many links did the old chain had, and how many does the new halflink chain have?
The spare bike I had to use last year has 52/16, it took me a couple weeks to train pushing harder, and vice versa, when main bike was repaired, it felt a couple weeks easy to push, the difference is 3.25 <> 2.94, same teeth count difference but percentual less than your change.
Out of curiosity to check the tables I found, did you count how many links did the old chain had, and how many does the new halflink chain have?
