vr1000

Last year, I bought my first road bike in 20 years. A Giant OCR3. I have about 500 miles on it and its ghost shifting. That tells me its time for a tune up. What I want to know is it worth it to buy a 9 speed Ultegra rear derailleur and bolt it on. Will it improve the drivetrain or should I just go with Sora until I get my next bike?

Sheldon Brown

It will certainly work, not likely to make any real improvement though.

Sheldon "Lighter And Prettier" Brown

Portis

Both the sora and the ultegra will need adjusted. The sora is already on the bike and won't cost you anything, so I would go that route.

TO11MTM

Keep the Sora on there... just get it in adjustment.

EvanGaffney

shifters are what make the real noticeable differences. Unless you feel like dropping the cash on some ultegra sti's i wouldn't bother

TallRider

given that we're all in agreement it's not worth upgrading your rear derailer, let's tackle your "ghost shifting" problem. Can you describe the problem in more detail?

Mr. Underbridge

I've been cycling for less than a year, but one of the things I'm glad I did early on is learn to tune my bike. I started riding with a 15 year old 'hybrid' Giant that I've had since before I could drive. I rode it out of tune, and learned to tune it myself, with the knowledge that if I broke anything...well, I wanted to get a new bike anyway! I did screw some things up but managed to fix them, and rode that bike for about 400 miles until I knew exactly what I hated about it. Then I got a used Giant OCR2. There are some things I don't like about it, and in a couple of years I'll probably get a better bike.

As for your problem, I'd be surprised if you've actually worn anything out in that many miles, so it's probably just breaking in a bit. You didn't mention whether you've damaged it (wreck it, get the cage caught in the spokes, etc), so I'll assume the RD's OK. You also didn't mention what kind of shape you've kept the bike in - if not the best, give it a good cleaning and make sure the chain doesn't have any frozen links.

If it's a new bike and still in good shape, it just needs tuning! If it's autoshifting, this probably means there's some friction on the cable at some point where you don't want friction. Worst case, this would involve replacing a cable, but might be solved with some lube. If it's simply skipping gears when you do actually shift, you can probably fix it with the barrel adjusters.

Again, I can't recommend highly enough the value of learning to diagnose your own mechanical problems, for a couple of reasons: 1) it'll be pretty expensive going to the LBS every time you need a little tuning, and 2) things may happen when there's not a LBS around. And in any event, you definitely can't go buying a new RD every 500 miles!

Good luck. As mentioned, if you have more details as to whether the ghost shifting is front/rear, up/down, with/without shifting, and with/without chain slip, that would help. Oh, and check out Sheldon's site as always, here's his article on derailer adjustment: https://www.sheldonbrown.com/derailer-adjustment.html

Al1943

It's common for a new bike to need adjustments by the time it has 500 miles. Most likely the shift cables have lost some tension due to the cables settling into the housings. Your dealer should do the first tune-up at no cost, but it would also be good to learn good basic bike maintenance. For this go to https://www.parktool.com and look for the instructions for derailleur and brake adjustments. It's important to do all of the derailleur adjustments in proper sequence.

Al

kartoffel

Rear dérailleur envy is a common cycling affliction which may progress to fullblown OCP-ness if left untreated. If your symptoms persist, I'd recommend convincing your significant other to let you install a 105 or Ultegra RD. If your SO balks, explain that unlike the related "fred stem" condition, rear dérailleurs cannot be flipped.