Tandem Cycling - Any reason not to use a 10 speed timing chain

Other than cost.

Seems like a relatively inexpensive way to save 100 grams or so. And while a lightweight 10 speed timing chain might not be as strong as a typical timing chain, given that it has less load, and no shifting stress, it would appear it would be sufficiently strong and long lasting.

Other than cost.

That's about it...

I think it is a good idea to use a 10 speed timing chain if you are using a 10 speed drive train. It is always available as a replacement for your drive train in an emergency and you aren't anywhere near a shop that sells 10 speed stuff.

Of course the stoker is going to have to do all the pedaling untill you replace the timing chain.............

I think it is a good idea to use a 10 speed timing chain if you are using a 10 speed drive train. It is always available as a replacement for your drive train in an emergency...

????

Sort of, but it's the other way around. You can always take a few links out of a drive chain if it becomes damaged and it will still work. However, your sync chain needs every link to work properly. Therefore, in the rare event a sync chain gets damaged you can usually cannibalize the drive chain for a pair of links... so long as the drive chain is the same width or even a bit more narrow, just not too narrow for your timing rings.

Of course, to do this your on-bike tool kit will need to have a chain tool and:
1. use chains that allows you to reuse the rivets; and / or
2. have some reuseable links and /or
3. have the right size single use rivets for your brand & model of chain(s)

This was all a lot more straight forward before 9 and 10 speed came along. Nothing insurmountable, just a few more things to consider.

Yup, great way to save some ounce$!
Have broken timing chains about 3 times.
Once on a week-long tour from Grand Canyon to Mexico; happened in motel parking lot; yes had extra links/tool; not many bikeshops on that route, so was prepared!
A couple times on local rides, close enough for pilot to just steer and have stoker Kay pedal us home!
Stuff happens!
Pedal on TWOgether!
Rudy and Kay/zonatandem

Cool. Now I have a reason to justify the expenditure. Hoeny, it's not just the weight savings, but it will better prepare us to deal with any chain problems on the road

I use a Campy Record 5.9 chain and have had no issues. Heck it was even cheaper than filling up my truck at the gas station.