Then stick some 33mm on it and race 'cross.
You can even do that with a Canyon Endurace.
(I also fitted WTB Riddler 37c on the Endurace, so it's like the Standert, just less expensive).
What's the widest the Endurace can fit? I'd like to change the 30c on my partner's bike to something wider.
I'm guessing 650s definitely won't fit?
700c 38mm is the very max and varies on tyres.
With that sizes, it actually affects the handling noticeably, 650b touch the tubing at 42mm, so I'd wager 38mm 650b being max, however this will have a smaller impact on handling than a big 700c.
@ak started
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You can even do that with a Canyon Endurace.
(I also fitted WTB Riddler 37c on the Endurace, so it's like the Standert, just less expensive).