Brompton 54T pre-spider chainring

[BromptonTourer]

Hi. I need an old style (pre-spider) 54t chainring, new or in very good condition. I have a 30t ring bolted inside a (now badly worn) 54t which, I use for long, steep climbs when touring. Have not yet found a way to fit the 30t to the spider design; hence I want to replace my old, worn 54t with another of the same design.

 

[rogerzilla]

Keep an eye on eBay. They should be very cheap (I just sold a really nice 50T set for £9), since the 119mm ISO BB they are designed for is now virtually extinct. They will go onto a 110mm symmetrical JIS BB nicely, but Brompton advise replacing the whole lot (of course).