gears skipping on bumps

adesaxo31

Hi iv built my da bomb sputnik with all new components with a shimano holowtech front crank set on a single ring slx rear mech 8 speed a 8 speed shimano cassette not sure which one and a 8 speed chain oh and a gamut chain tensioner all the gears. shift amaizingly but when I'm on rough terrain and pedaling hard the gears skip which comes quite keen at times is there any way of stopping it all the best ade

nicklouse

Skips or slips.

skips - try's to change gear.

Slips - stays in the same gear.

adesaxo31

It tries to change gear mate thanks

Chunkers1980

Adjustment most probably the

adesaxo31

Adjustment to what mate when I'm on smooth road it shifts smoothly its as if the rear mech spring isn't strong enough to hold it in line

Chunkers1980

Spring only pulls to the cable limit.

Not sure, explain more.

nicklouse

lets have some side on pics. whole drive train.

Chunkers1980

And a rear innit.

adesaxo31

I can't upload pics mate sorry I'm only on here on my phone

adesaxo31

I ment the spring throught the middle that pulls against the cable behind where it says slx and it mainly jumps up the gears with a bit of a clunk I'm wondering if its defective because i can push it back up through the gears with very little force thanks for all your help

The Rookie

So does it skip up a gear (smaller cog) as you say or down a gear (bigger rear cog)? The cable stops it shifting up, the spring it shifting down, still sounds more like adjustement.

Easy to post photo's with a phone, just get an App for the relevant host (like photobucket) and post that way!

adesaxo31

It goes to a bigger cog mate sorry I'm taking it to my Lbs see what they say thanks for all the help all the best ade

nicklouse

what rear mech?

sounds like set up needs sorting.