Elusive Clunk on Single Speed

[crossnutz]

Spot Singlespeed Ti with Truvativ Stylo SS GXP Crank \
and Spot Singlespeed hub.

This puppy clunks, Once per revolution, then disappears.
Today clunked for awhile, then gone......

Cranks are new. (integrated bottom bracket)
Hub is fairly new.
checked all crank stuff for tightness, you know pedals,
crank arm, bearings, chainring bolts.

Don't know much about hub, possible?
Seems like crank area, but can't figure it out.

Scott Calley

 

[[email protected]]

Check your seat and seat post and seat tube and top tube.

crossnutz wrote:
> Spot Singlespeed Ti with Truvativ Stylo SS GXP Crank \
> and Spot Singlespeed hub.
>
> This puppy clunks, Once per revolution, then disappears.
> Today clunked for awhile, then gone......
>
> Cranks are new. (integrated bottom bracket)
> Hub is fairly new.
> checked all crank stuff for tightness, you know pedals,
> crank arm, bearings, chainring bolts.
>
> Don't know much about hub, possible?
> Seems like crank area, but can't figure it out.
>
> Scott Calley

 

[Phil, Squid-in-Training]

crossnutz wrote:
> Spot Singlespeed Ti with Truvativ Stylo SS GXP Crank \
> and Spot Singlespeed hub.
>
> This puppy clunks, Once per revolution, then disappears.
> Today clunked for awhile, then gone......
>
> Cranks are new. (integrated bottom bracket)
> Hub is fairly new.
> checked all crank stuff for tightness, you know pedals,
> crank arm, bearings, chainring bolts.
>
> Don't know much about hub, possible?
> Seems like crank area, but can't figure it out.
>
> Scott Calley

Bent chainring tooth?
--
Phil, Squid-in-Training

 

[Vee]

crossnutz wrote:
> Spot Singlespeed Ti with Truvativ Stylo SS GXP Crank \
> and Spot Singlespeed hub.
>
> This puppy clunks, Once per revolution, then disappears.
> Today clunked for awhile, then gone......
>
> Cranks are new. (integrated bottom bracket)
> Hub is fairly new.
> checked all crank stuff for tightness, you know pedals,
> crank arm, bearings, chainring bolts.
>
> Don't know much about hub, possible?
> Seems like crank area, but can't figure it out.
>
> Scott Calley

Betcha it's your freewheel. Grab the freewheel (with or without the
chain in place) and try to rock it back and forth. You'll likely here
a slight knocking. You could: get a new freewheel; flush the old one
out with degreaser and chain lube, and hope for the best; or overhaul
the old one (see concurrent thread - mostly relevant to SS FW's).

-Vee

 

[Qui si parla Campagnolo]

crossnutz wrote:
> Spot Singlespeed Ti with Truvativ Stylo SS GXP Crank \
> and Spot Singlespeed hub.
>
> This puppy clunks, Once per revolution, then disappears.
> Today clunked for awhile, then gone......
>
> Cranks are new. (integrated bottom bracket)
> Hub is fairly new.
> checked all crank stuff for tightness, you know pedals,
> crank arm, bearings, chainring bolts.
>
> Don't know much about hub, possible?
> Seems like crank area, but can't figure it out.
>
> Scott Calley

Lottsa grease in the BB?

Slipping/sticking pawl in the freewheel?(my bet). If ya do, and one
sticks down and the other breaks...is really gonna hurt.

Flush the FW, lube with Mobil One.