Shimano Biopace 38T chainring replacement?

roubaixtom

Hi,

I'm currently resorting a 1992 British Eagle touring bike and I need to replace the front middle chainring. The chain rings are Shimano Biopace which means they are slightly oval.

It is a 5 bolt crank arm with 110bcd.

What sort of chainring am I able to replace this with?

Thanks

imposter2.0

You can replace it with any other 5-bolt 110bcd (ie compact) chainring.

roubaixtom

Imposter wrote:

You can replace it with any other 5-bolt 110bcd (ie compact) chainring.

That sounds ideal, could you please post a link to a suitable option

Thanks

imposter2.0

There's loads Tom - I'd just go for a TA or a Stronglight ring from somewhere like Spa Cycles, there's loads similar on ebay as well..

daniel_b

Imposter wrote:

There's loads Tom - I'd just go for a TA or a Stronglight ring from somewhere like Spa Cycles, there's loads similar on ebay as well..

Think I bought mine from Ribble and CRC.

roubaixtom

http://www.ribblecycles.co.uk/stronglig ... chainring/


So this should be ok as an middle chainring?

mercia_man

That Stronglight chain ring from Ribble is for a compact double chainset and doesn't have any ramps or pick up pins. This means that the shift from little ring to middle will not be as good as a ring specifically designed as a middle ring. Have a look at the following Stronglight ring available from Spa Cycles. It does have pick up pins and ramps to aid shifting.

http://www.spacycles.co.uk/products.php ... b0s149p294

cycleclinic

I am sure i have a 38T biopace chain ring in good order in my stash. a round ring with 110 bcd will work fine though.