Simply no.
Why not? Put mine on the 'crosser yesterday to get to work and home, removed them just for training.
http://www.chainreactioncycles.com/mobile/sks-s-blade-rear-mudguard/rp-prod104734?gs=1&gclid=Cj0KEQjw4fy_BRCX7b6rq_WZgI0BEiQAl78nd5e6cTUwzOKiKGuewxtz4v52LhGYpap82r1fb09aCU8aAvoQ8P8HAQ&gclsrc=aw.ds
@Ramsaye started
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Simply no.