Hi
is it possible to fit 38mm or even 40 tires on Crux carbon 2020 because I read that 33 is the max? And is it a big difference between 33 and 38?
I use Crux as my winter bike for the road, gravel and offroad combo riding and I’m interested how much would I get on offroad and lose on road with 38c tires?
Tnx
From what I remember, the website states that with 33c’s, there’s 8 cm of clearance left. I’m not sure how that translates to real life but I’d imagine you could get a 38c tire on there with no trouble. I haven’t tried though.
I ran Maxxis Ramblers 40’s last year at DK on my 2017 Crux…no issues.
Currently running Goodyear Connector Ultimate, also in a 40…again, no issues.
Also, can’t recommend the Goodyears enough…fantastic tire.
I’ll also note that 40 is probably about the max, though…the chainstay clearance is pretty tight now.
I have a 2015 Crux and I can fit 40mm (actual) with no problem. 42mm would be a squeeze.
I actually ran 45mm on the front and 40mm rear for a while. There is tons of clearance on the front.
If you ride in mud though you’d probably get clogged up quickly with little clearance.
My understanding is that 33 is the max width to still maintain the recommended mud clearance. I run 38’s routinely for dry gravel with no issues at all. I’m not sure I would run 38’s on a super muddy CX course, but that only happens a few times a year.
I’ve been using 38mm on the front and rear since I swapped out the stock 33mm when I bought mine in 2015. For gravel rides/races and CX races the 38’s have been just fine. I just put a 40mm on the front for BWR Cedar City and that was great as well. Looks like I may be able to fit a 40mm on the rear as some have listed, but there is not much room for any dirt or mud build up so I personally stuck with the 38mm on the rear.
Is it a big difference between 33 and 38 tires? Is it a lot better on offroad and lot slower on road?
Which one is goto for 70% road / 30% offroad riding?
My aluminum Crux clears 40mm WTB Nanos and 38mm Gravel Kings with no issues at all in the rear. Front fork can almost clear a 2” MTB tire.
I have a 2013 crux elite, any idea on maximum width? I have 33mm Maxxis mud wrestlers currently…
For 70% road, I’d learn towards optimizing for road - get the narrower tire and one with a smoother center section.
When you go offroad, don’t ride gnarly trails unless you are willing to go slow.
Bringing this back as I try to get my crux ready for the fall 
What’s the max 650b size people are fitting? I got some 48s, which in hindsight was stupid, and guess what they didn’t fit 
I’m trying to figure out if I could fit a 42, but just not sure.
My buddy ran 700x42 tires on his Crux for The Rift a few weeks ago…but it was a very tight fit and would offer no room for mud clearance (he also prbably only had 17mm internal width rims, max).
Given that, a 650 x 42 tire should fit, but have no idea what the clearance would look like.
Good info. Thanks. I’m running 23 interal rims, so yeah it still might be a stretch. But yeah, especially with 650b wheels, I’d like to run at least 42s to keep the BB from dropping too much.
I’m thinking about Specialized Pathfinder 38 or Maxxis Rambler 40
I ran Rambler 40’s on my Crux for DK in 2019 and had no issues. Think my internal rim width is 21mm, FWIW.
I just put on some WTB Byway 40s (700c 21mm internal) and they’re awesome, but kinda wish I’d crammed a 42 in. I try to avoid mud so I think I could have gotten away with it. Trying decide what to run for Big Sugar in October.
I’m in the exact same boat! I’m going between 38’s with Cushcore inserts vs cramming in a 42 without much nob
Could one fit the 42 pathfinders on front and 38 on the rear?
does it make sense to have two different tire sizes?
I for sure can fit at least 42 on the front, but not the back
Run the 42’s if you can for Big Sugar. IIRC from 2 years ago, there are very few sections where it could get muddy, even if it rained. The gravel roads in the area drain extremely well.