Good News Bad News

[The Jogger]

Good news is at last I have started to use my bike for training and will commute a bit on it in the near future.
Yesterday I did a 8m ride in 33:56 followed by a 3m jog
Today 8m 36:38 (much lower heart rate) followed by a 5m jog but quicker pace than yesterdays. I really enjoyed it and might do more tomorrow.

Bad news is, the bike which is a bit small for me Sezalized Sirrus and Halfrauds wouldn't change seems to be slipping on the chain/sprockets. I had this when I first got it and brought it back to that lot but it is still doing it even after they gave it a 6 week service. Can I fix this myself.
Cheers
Roy

PS: On the ride I counted my cadence averaged about 80. Is this real bad?

 

[HJ]

A cadence of about 80 is quite reasonable and nothing to worry about, actually it is quite good...

 

[Angelfishsolo]

My 10 cents worth of advice

I'm sure others will give more detailed advice than I but from my experience. Clean all cogs with an old tee-shirt or strip of sheet.

Check chain tension -

Count out twelve links of chain. If the chain is new the 12 links will measure 12 inches to the centre of the rivet whilst a chain ready for the bin will measure an extra 1/8th inch.

Check gear cable tension -

Move the front and rear shifters and look to see if the rear mech moves on each gear change. If not the cable may need re-tensioning. This can either be done by using the adjuster screws or by releasing the holding nuts and pulling (or slacking off) the cable from the dérailleur. Generally only a very small amount of adjustment is needed as more than this indicates time for a cable change.

Take a look at the rear mech. -

Slipping up or down can be rectified by fine tuning the H + L screws of the dérailleur Inability to get highest cog means L(ow) screw needs adjusting whilst the inability to get smallest cog equates to H(igh) screw needing adjustment

DIY maintenance can be serious fun and can get under y9ur skin as much as actual cycling can. If all of this fails take it to your LBS and ask them to service it for you along with sorting out the gears. I wish you the very best of luck.

Bad news is, the bike which is a bit small for me Sezalized Sirrus and Halfrauds wouldn't change seems to be slipping on the chain/sprockets. I had this when I first got it and brought it back to that lot but it is still doing it even after they gave it a 6 week service. Can I fix this myself.
Cheers
Roy

 

[swee'pea99]

Five minute job. Unless it's something more sertious of course, but that's unlikely.

 

[Maz]

How many miles have you done on the bike now? It could be that the chain is jumping because it is wearing out. Do the measurement thing pointed out above.
I rather foolishy ignored the jumping chain when it happened on my Sirrus (after about 2000 miles), only for it to snap on the way home.

 

[John Ponting]

If it was jumping before a recent 6 week service then take it back and complain very LOUDLY.

If it was OK before the 6 week service but came back slipping then take it back and complain very LOUDLY.

If you don't trust either Halfords or yourself then visit an independant bike shop - every town has them - and get their advice. It may cost you.

If you are going back to Halfords then it would be prudent to do so before fiddling with it yourself.

 

[The Jogger]

Thanks guys for all the advice. I think I'll stay away from Halfords, try and sort it myself and if that don't work, LBS Maz, it's done less than 200 miles
Cheers
Roy