prezmc

Got a new bike today (giant defy adv 2), and was riding on my usual rural routes. on the last road, there is a spot where they cut the pavement for some work, and unevenly dumped gravel to try and fill it, but poorly - leaving a drop and a 2" to 3" ledge that i bounced through. Needless to say, going through it, and coming out the other side, my rear derailleur it out of whack. Immediately jumping gears, etc. Seems odd, i've not yet experienced shimano 105s get jacked up so quick. I adjusted it, but it still seems not quite right. Has anyone had such an experience? It also seems like the magical carbon wheel in the rear got ever so slightly out of balance from it, but barely noticeable.

notenoughdaylig 

Check that it's fully in the dropouts

69chevy

Yes reseat the wheel and make sure it's squared up in the dropouts.

prezmc

I attempted to upload a photo to show, but it won't let me, nor can I link to a photo online. Good times. Anyway, I *think* it's still in the correct spot.

prezmc

Being new to this, I am not sure what you're referring to. Which wheel? (Although the wheels are all in fixed positions). I did check the dropout, and I think it looks correct.

FlashBazbo

Is it possible that a piece of gravel got tossed up into the derailleur cage, jammed the works, bent the cage, then fell out? (I once had a piece of gravel bounce up into my rear derailleur cage. It wedged in and locked everything up. The gravel didn't fall out -- the force ripped the rear derailleur off the bike. I ended up having to replace the derailleur and the hanger.)

jadocs

Your rear wheel, loosen the quick release and reset the wheel in the dropouts and tighten it back up.

69chevy

The rear wheel.

The dropouts are the rear most part of the frame and are slotted where the wheel skewer slides in before its tightened.

If the skewer slipped a little, your wheel is now in crooked and could be why your shifting was weird.

badger1

If it's an '18 or '19 Defy Advanced, bike has thru-axles front/rear.

jadocs

Got it check to ensure the bolt on your rear derailure hanger is not loose and torque it to spec.

rumrunn6

Wifey trashed 2 tires in her new car this spring, in some sick potholes. cost her $500 to replace them

69chevy

Are the through axle threads integrated into the RD hanger?

I'm a rim braking quick release kind of guy and wasn't aware the Defy was a through axle bike.

badger1

Good question! I don't have a Defy, just happen to know they've gone to thru-axles the last couple of years but I've no idea how if at all the hanger is integrated into the axle system.

I'm still with rim brakes myself on the road bike. Heck, even my mtb has quick release wheels.

Iride01 

If it's a new bike, why not go back to the shop and see what they can do before you goof something up that voids any warranty you might have.

Zaskar

Please don't take this the wrong way... but, regardless of the current wheel/derailleur issue, it sounds you need to become a bit more familiar with the bike, the parts, how it goes together and how it works. You WILL need to remove that wheel on the side of the road someday. Maybe spend sometime in the garage with a beer and YouTube and pull the wheels off, put'em back on, adjust the rear derailleur...

Some of these seemingly complicated tasks are comically simple (like adjusting a rear derailleur). And really, YouTube is a goldmine for this.

FlashBazbo

You resurrected a thread that had been dead for 8 months, just to chastise the guy?

Zaskar

Whoops. Didn't see that. I did a search for something else... read, read... kinda forgot to look at the dates. Guy's probably a seasoned pro by know. Sorry about that.