General Enquiry or to Order a Chainring.

Please Fill in as much info as you can about the chainring or chainrings that you are after.  I will ask any questions that I need at this end and we can work out what you are after as well as price and any other specifications.

I will eventually get an address from you and send you across my Bank details for payment.....there is sometimes a bit to figure out but  it is pretty straight forward and shouldn't be too difficult at all.


Note: Please fill out the fields marked with an asterisk.

If you would like to have a chat about some chainrings that you are after or anything you might think I may be able to help you with please call the CHAINRING HOTLINE.....not really, it's the workshop number......(02)  9525 0778


Cycleunderground has been around for over 22 years.

A lot of customers are surprised to find out that it is a one man machining and fabrication shop.

My name is John Bosevski and I have been servicing, repairing bicycles and building  frames, tools and bits for bikes for over 30 years.

I now concentrate on my components and tools and slowly develop new product and tooling to increase my offerings.

I prefer to concentrate on the bespoke side of bicycles, putting my effort towards products and tools that have been forgotten or overlooked.

 My workshop can be found in Taren Point,  Sydney,  Australia.