Front Deraillieur Issues on New Bike

[ollyno1uk]

Hi Guys

I have recently got a Boardman 2012 hybrid pro. I got it in the box and I am having some issues.

Firstly, I have a little brake rub. I have followed all steps online to cure it, which did help but not eliminate it. I am now thinking a may just need a little wearing in. I had it on the front and rear a small amount, and today, after my first 8 mile ride, the rear is now fine. Maybe I just need to use the front a little more.

The main issue is setting up the front Derailieur. I have spent hours and hours trying various things to get it to work.

The gear shifters are SRAM SL Double tap 2x10 with a SRAM Rival.

I start with the cable off, set the lower limit. Add the cable - I have tried with a little tension, no tension, more tension but no matter what happens It either will not change up onto the larger cogs, or the cable seems too tight to allow it to click twice on the shifter. It will often change up on just the trim setting as well. This is often combined with a load of chain rub in certain gears.

The best I can get it is that it goes up on some of the gears, and on some of the gears I have a lot of chain rub.

I have watched a lot of youtube videos, and followed all instructions I can find but I can never get it changing correctly in the majority of gears.

At the moment it is rideable but I am never sure which gear I am going to get and don't want to cause wear on the chain.

Sorry for the long post, I hope someone can offer some advice!

Thanks

Olly

 

[ollyno1uk]

Hey

Thanks for the quick response.

Regarding the brakes I have loosened the two screws and pumped the brake 5 times then done them back up. I have not made any other adjustments as I can find no info. As they are hydraulic there seems to be no cable adjustment.

The derailleur is about the thickness of a penny above the larger cigs and seems parallel to the cogs as well.

Thanks!!

 

[MikeW-71]

To centre the hydraulic brakes, loosen the two bolts then squeeze the brakes hard a couple of times, then hold the brake full on and tighten the bolts. If it still rubs, do you have a slightly warped disc?

 

[ollyno1uk]

To centre the hydraulic brakes, loosen the two bolts then squeeze the brakes hard a couple of times, then hold the brake full on and tighten the bolts. If it still rubs, do you have a slightly warped disc?

Thanks for the response - These are the steps I already carried out. This is a brand new bike and I can see no visible warp to the disc. When I spin the wheel there is definitive place the wheel binds, it just seems that the pads are everso slightly in contact with the wheels!

Sorry...just re-read and see that you've got hydraulic disks.....ooops. My advice was good for anyone with a road bike

No worries! Thanks for helping!

After riding home last night, the brakes seems to be less and less of an issue.. The gears on the other hand - really not good!

Any further advise on setting the front derraileur would be great.

 

[Kestevan]

The SRAM FD can be a bit of a mare to setup correctly (although once done it's a great piece of kit).

Main thing I found is that the cage has to be in "exactly" the right position before you start. The gap between cage and ring, and the angle are crucial - SRAM kit is much less tolerant of spacing errors than Shimano. If you dont have the installation sheet that comes with the mech, you shouold be able to download one from SRAM - this gives the correct spacing and angle (dead parallel and bloody close are about right ).

Once this is set, the actual setup should be relatively straightforward. Start with the cable finger tight and the barrel adjusters 3/4 out so you can apply more tension till the change starts to get noisy, then back off v. slightly on the barrel. Now when you change the FD should shift rings (if not check the limit screws are not set too low) keep adjusting limit screws (tiny changes) till you eliminate chain rub, then switch rings and do the other one. Remember you will probably get a slight amount of rub when cross chaining - tweaking should eliminate this on all but the 2 extremes.

However I'm confused about your reference to the trim function.... the SRAM trim works on the big Ring, so you should be changing up from the smaller ring on the first "click", the next click is the trim, and then the switch to the inner ring.

 

[ollyno1uk]

However I'm confused about your reference to the trim function.... the SRAM trim works on the big Ring, so you should be changing up from the smaller ring on the first "click", the next click is the trim, and then the switch to the inner ring.

Hey, thanks for taking the time to respond.

I am maybe mistaken about the trim function - probably because the gears do not change correctly. On the display I have "1" then a "-" then "2". On the first click up it stops at the "-" this can cure some chain rub on some gears. I have had it where it does move up to the larger ring, and I have had it where it only moves to the larger ring when it displays "2" and of course, where it does not move up at all.

The barrel adjusters you mention, I only have one adjustment that I can see which is on the shifter itself. It seems as I unscrew this the cable gets tighter.

This is my first bike with this kind of system so it is new territory (as ifs probably obvious!)

Thanks again

 

[Kestevan]

Hmmm, sounds like the flat bar trim is different to the drop-bar "road" trim, that type changes to larger ring on 1st click, then has a trim position......

The road levers dont have an inbuilt adjuster they use a seperate adjuster on the frame, but it serves the same function. with the cable un-attached screw the adjuster in/out till it's about 3/4 in, then attach the cable fairly so as to remove all the slack, but not put any tension on the FD. then adjust wit the adjuster till you can hear it beginning to try changing, then slacken off a touch - this should be your starting position.

 

[ollyno1uk]

Great - thanks

I downloaded the instructions from the SRAM site. I think the position is correct but will go over it again tonight, trying the ideas you have suggested and see if I can make any headway!

Thanks for taking the time to help.