rmac Design

Pre-65 Triumph Tiger Cub Trials

Dave Thorpe

From his workshop in North Yorkshire, Duncan Macdonald designs and hand-builds unique components for Pre-1965 Triumph Tiger Cub trials bikes.


Armac Design is a family business, run by engineer and trials rider Duncan Macdonald and his wife Judy. They are proud to make unique, original products in Britain, backed up by personal, friendly service.


For detailed product information, pictures and stock levels, please click on the product name. If you have questions, please contact us.



or call 01751 417371


The Pre65 Scottish 2019 has been won by Dan Thorpe on a full Armac Cub, with REH Forks, on 1 mark lost. Third place went to Gary Macdonald, also on a full Armac Cub with REH Forks, owned by Dave Stewart, 2 marks lost.

Congratulations all!


All Armac Design products are Copyright and Design Right Protected. Look for the logo!

Dave Stewart's prize-winning Armac Cub with REH Forks.

Leslie Winthrop rode this to a Special First Class Award at the 2018 Pre-65 Scottish 2-day trial,

finishing 17th on just 15 marks lost.


Dave Thorpe, many-time British pre-65 champion, and winner of Pre-65 Scottish and Isle of Man 2-Day Classic, on his Armac Cub, at Hawk's Nest, Derbyshire

Picture: Yoomee Products / John Hulme

We also manufacture R.E.H. Forks., accessories and yokes: www.rehforks.com


Original Design * Quality Products * Friendly Service

Logo DS-Armac 2 DS ARmac-1