Wife and I purchased a couple new bikes a couple weeks ago. We are both new to trail riding, though I’ve been on two wheels my whole life. She got a Roscoe 6 I believe and mine is a Marlin 7.
I’m having some issues while trying to shift to my lowest last two gears. Seems the chain is trying to catch but continually slips until it drops off the cassette entirely. Do any of the teeth look to be the reason?
I have about 35-40 miles on the bike currently, bought it brand new, hasn’t seen any drops yet, just some blue trail riding on a new track I am trying to learn. Thank you so much for any advice and input. Love the sport, mad respect for all of you.
by illocor_B
10 Comments
Look le new.
Your shifting issues are derailleur setup issues most likely. You should take them back to the shop and have them correct it.
Used
Cassette looks good, not much wear there
Eh. There are two bolts which determine how far left and right the derailleur will move the chain. Adjust these while testing and your issues should go away.
Those teeth are designed uneven on purpose. It’s to help the chain shift between gears.
Most shops offer some kind of new bike checkup. A lot of times a bike needs to settle in a bit and something may get a little out of adjustment, or maybe something wasn’t quite right on initial setup. I’d take it to where you bought it from and tell them what’s happening, they should be able to get you sorted.
Pretty new just a bit dirty
Go to a bike shop.
If you just bought them brand new a couple of weeks ago and you’re having shifting problems then the drivetrain just needs a little adjustment, which the bike shop will do as a part of the purchase. The cables may have “stretched” a little during break in, which is normal.
By “lowest” two gears did you mean the smallest sized gears? Those would be the “highest” gearing wise. The limiting screw might need adjustment.
Cassette looks fine. If you’re concerned about the occasional tooth that’s shorter or shaped differently it’s on purpose, there are specific patterns that align on the different sprockets to make shifting smoother.
You just need a simple derailleur adjustment—it’s expected after you put a few miles on a new bike/drivetrain. You can either take it back to the bike shop where you bought the bikes (most will do the first adjustment/tune up for free) or just search YouTube for basic derailleur adjustment how-to.