I'm thinking of getting full mudguards for my road bike, the Triban RC 520 , (details [here](https://www.decathlon.in/p/8544695/heavy-products/triban-rc-520-cycle-touring-road-bike-cn))
, and the manufacturer's page tells me that it comes with 700 x 28 tires and the frame is compatible with tires upto 36mm.

Searching for SKS Bluemels, I find the following sizes useful : 35 mm, 42 mm and 45mm. The 35 is good for 20-28mm tires and the 42 is good for 25-35 mm tires , it appears. The 45 seems a bit overkill for 28-38 mm.

I think I should go for the 42 mm ones for upgradability to bigger tires later, but since the frame is compatible with upto 36 mm tires only, would these "42 mm" fenders fit ?

(perhaps this is a silly question , but I'm buying online so want to be sure that they will )

Or is this measurement of the mudguard width not the same as tire width and so I can go ahead with the 42 mm ones ? For that matter, will even the 45 mm ones fit ?

*NOTE :* I have seen [24683](https://bicycles.stackexchange.com/q/24683/50082) , but the question here is slightly different - what I ask is if the mudguards bigger than 35 will even fit.

**EDIT 1** : Will [these](https://www.decathlon.in/p/8539800/cycle-mudguard/mudguard-with-stays-for-the-riverside-500-500e-900-920) from Decathlon fit too ?

**EDIT 2** : My bike has disk brakes, so there are no rim brake calipers in the way.