@jimmy – there’s a very good chance they will be fine. I ran 40mm smooth and 40mm semi-nobbly tyres on my V1 and there was plenty of clearance on 22mm wide internal rims.

Ended up buying 42mm contis which for the frame fine but too big for the mudguards. Swithering between Kinesis Fend Off wides, or Bluemels.

Any experience or pics of either – on a V1?

Haha, I came to ask the question that I left a year ago seemingly.

Do fend off wides fit on a Tripster v1 (this is a yes based on measurements) but with 42mm tyres?

Info under Specification here https://www.upgradebikes.co.uk/Catalogue/Mudguards/Kinesis/Fend-Off-Wide ?