[farmertan]

I need some advice. I'm relatively new to singlespeeds but I love it. I have a Specialized Stumpjumper 29er hardtail that has adjustable dropouts. Problem is, they don't hold. I've tried better bolts (the stock ones are crap) and tightened to factory specs (actually a hair more). I've tried over and over and they don't hold. :madman:

I don't want to go through getting another frame so I can either make this a 1x9 (moving the dropouts all the way forward) or get a chain tensioner thingy:

http://www.surlybikes.com/parts/singleator_pop.html

I hate use one of these on what is supposed to be a true singlespeed frame, but at this point it's my last option.

So my question is how do these kinds of tensioners work and do they add much friction? Other thoughts? Thank you!

 

[campredcloudbikes]

you could try sanding the painted contact surfaces between the dropout and the frame

 

[hygieneboy]

Take it back to the LBS and make them fix it. I love my SS Specialized 29er Expert Rockhopper

 

[aka brad]

I found this photo

I suggest you contact your LBS or whomever you bought the bike from or Specialized. I would stay away from tensioners and look into the EBB from Forward Components ; it's a more elegant solution.

 

[SSSasky]

Try the sanding suggestion. there's no way you have to resort to a tensioner.

Make sure the bolts are greased, or else your tension won't be accurate...

 

[weather]

sanding. and get some chalk that you kids play with and chalk up the contact surfaces.

 

[Captain Chaos]

Threadlock?

 

[farmertan]

Threadlock?

Done that. The bolts are holding tension. The tension is not holding the dropouts.

I did the sanding and chalk, so I'll give it a try this week.

 

[scooter916]

pick up some carbon paste, either Tacx or FSA makes it, it is gritty grease like stuff, it is full of thousands of miniscule silicone balls held in a grease type matrix, when two parts are tightened together the silicone balls squish and fill in all the tiny imperfections and the flattened balls have larger surface area creating more grip.

it was originally designed for carbon parts with high gloss finishes, it says that you can reduce torque by up to 30%.

i have used it on many non carbon parts at my shop and it holds great

 

[kylemason]

Take it back to the LBS and make them fix it. I love my SS Specialized 29er Expert Rockhopper

I Also have the 08 Rockhopper and have converted to ss. I am having the slipping problem also. What did your LBS do to correct this problem? What terrain type do you ride and what gear do you run? My LBS has my bike now to fix the problem while replacing the brake side hanger.

ps farmertan has the M5 frame the Rockhopper is the M4 frame, different adjustment, same principle