Problems with Giant Revel 0

eSkovgaard

Hi,

As i'm somewhat rookie on this field i need som advice for optimizing my MTB

Bought a Giant Revel 0 for about a year ago, and it's a great MTB. I had it checked for about a week ago, but the things i mentioned was wrong are now causing problems again. So i need some advice for what might cause my MTB to run a little 'rusty'. First...

- Shifting gears is real bad. It tends to skip gears, and sometimes i have to 'click' the gear 3 times(!) before it shifts 1 gear, or often 2 at once. After it went to the bike shop it was somewhat fine, but now its skipping a lot of gears, and are irritating me - what is the cause? Need a new chain?

- Next i have a what would you call it? Crunchy chain? When i'm in the high gears, and i step down on the paddle at top, the chain gives a crunchy sound. Sounds like its coming from the crank?

- Lastly. Sometimes when driving straight and almost everytime i stear to the left it sounds like the front disc brakes are hitting against what might stand in the way? Can i somehow tighten the disc brakes?

Might be a a lot of info. But i'm interested in hearing if this 'normally' occurs for the Revel 0, og just general problems, and maybe how to fix them, or atleast a guidance for what might be the actual problem.

Thanks in advice!

cooldad

I would suggest reading Parktools and probably indexing the gears properly, probably replacing the cables, and checking and lubing everything.

Bikes need regular routine maintenance.

The Rookie

Skipping gears - may need a new chain (and may need a new cassette and chainrings depending on collateral wear), may need new cables (which sounds like was causing the original shifting issue, classic sticky cables), is it skipping (jumping in a single gear) or ghost shifting into other gears? Have a look from behind, is the upper jockey wheel inline with the sprocket and the chain not touching either of the other sprockets?

Crunching noise sounds like a worn chain dragging down onto the chainring - get a chain checker on the chain and check the length.

Check the front calliper is centred properly first! Also check the retaining bolts on the disc.

eSkovgaard

I'm sorry for the way too late answer - university has been hard on me!

Anyways, i appreciate the help i have gotten so far. I brought in my MTB to another mechanic, and they fixed the gear shifting problem, so that was lovely. First i tried myself doing the job by following your words, and could fulfill it (to bad).

But i still have problems with my chain, but i will try checking it, or otherwise buy a new one