Hoping for some wisdom. Newbie to having a 1x on a gravel bike. Bike came with the 10-44 xplr cassette and 40t chain ring which I will use for big climbs in racing. Most of local training riding though I plan on using a 44t chain ring to get more top end and still maintain a 1:1 bailout.
Question - with a 4t difference do I need to have two chains for each set up or is this where the B-screw adjustment comes into play?
Or would you try to size for a 42 chain ring to split the difference between the two perhaps?
It should be looser when in the 40t if they set it up with the 44t, be wary of excessive chainslap. I found 40t&42t used the same chain, it was too much of a stretch (pun intended) for the 44t. At second worst, you will likely break a chain and have non-optimal changing of gears.
It is very easy to check. I always use the following video.
6:45 - 7:10 is your reference point (pun intended if you watch the video)
Thank you @SirDAN, I’ll have a look at the video. The bike’s chain was sized to the 40t as that was the chain installed from the manufacturer, they put on the 44t and somehow managed to keep it working but as I said it is a bit noisy and suspect that it’s probably not quite optimal.
Was the chain you sized on your 40t&42t bike sized originally for the 40 or the 42? Just curious.
You can calculate the chain length, think I found an equation on the park tool website. It depends not only on the gears front and back, but also on the length of the chainstays. The longer the chainstays, the less important the gears.