I searched the list history and Caroline Golum has traditionally been
riding a 2009 era Betty Foy. It was their only bike and a daily rider, so
we may be talking about a Betty Foy (and a 105 Rear Derailleur) with
upwards of 50,000 miles on it.
Bill Lindsay
El Cerrito, CA
On Friday, June 9, 2023 at 7:59:44 AM UTC-7 John Hawrylak, Woodstown NJ
wrote:
> Caroline
>
> You could quickly check if your chain length (# of links) is correct by
> using this formula:
>
> # links = 2 * {(2*ChainStay Length (inches)) + 1/4*(# ChainRing Teeth + #
> Largest Cog) + 1}
>
> You can measure the chainstay length or if your frame is a RBW, look it up
> in the geo charts. Older RBW's tend to have 44 to 45 cm stays (17.3 to
> 17.7 inches). Since you have a 1 x drive train, you dont have to worry
> about which ring to use.
>
> If your actual # links is much greater than this value, your chain may
> have too much slack.
>
> John Hawrylak
> Woodstown NJ
>
> On Thursday, June 8, 2023 at 1:32:44 PM UTC-4 Caroline Golum wrote:
>
>> Currently running 1x10 and friction bar-end shifting. The chain keeps
>> coming off my crank, not hitting the right gear in the rear, etc. I've had
>> the derailleur serviced, it's fine, etc.
>>
>> Time to get a new shifter? Switch to indexed shifting? Switch to an
>> 8/9spd in the rear? The bar-end shifter is RBW's Shifter - Silver2
>> <https://www.rivbike.com/products/kjalgjoihjga44451>.
>
>
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