A smaller rear sprocket?

[Holdsworth]

My question is this:

On my 90s Holdsworth road bike I have a 50/34 Sunrace chainwheel and a screw-on sprocket cluster with a 14 tooth sprocket as the smallest one. Even though the bike hasn't been ridden for a while I remember spinning out at around 30mph on the smallest cog and I would like to see if there is a screw-on cluster with a smaller cog. My LBS where I bought the wheel (a replacement for the original wheel set) says he doesn't stock any clusters with smaller cogs so I will have to look elsewhere for one.

Does anyone know where I can source on from?

 

[HLaB]

The last freewheel bike I had, I got replacement cogs from the Ed Bike Co Op (but that'd be 5 years back), mine was 7sp.

 

[albion]

Angepatten on ebay seems to have bought a large sunrace batch.
Check item 280765414704 though it looks like only 13-34 is left.
There is a rare 8 speed too if you have a shifter for it.

Google Sunrace 13-25T etc to find them all.

 

[swee'pea99]

Ebay does have one or two...
http://www.ebay.co.uk/itm/vintage-S...sure_cycling_bikeparts_SR&hash=item20bf22827c
http://www.ebay.co.uk/itm/Vintage-R...sure_cycling_bikeparts_SR&hash=item415fbfc37e
each with a 12 minimum.

Might it not be an option to replace your chainset with, say, a 53/39?

 

[RecordAceFromNew]

Once upon a time, Shimano made an exceptional 11T+ freewheel, and matching the range of cassettes. The late great Sheldon devoted a whole article on it http://sheldonbrown.com/mega7/

Probably too expensive to make for the market to bear, Shimano stopped making them, and people (like me ) who could find a good one keeps it in the cupboard.

However there is clearly a market for it, evidently for electric bikes e.g. hence Taiwanese copies are available: http://www.dnp.com.tw/pro2.asp?ID=1&tmpEdtion=English or http://www.ebay.co.uk/itm/7-Speed-Freewheel-11-30T-11-32T-11-34T-LONG-YIH-DNP-/300608017428