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More Asphalt Less Gravel Question

Old 03-18-16, 10:47 AM
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More Asphalt Less Gravel Question

A couple of months ago I a purchased a Trek Crossrip LTD, and love the bike. Or at least, love riding. I am riding 100+ miles a week and searching for time to do more.

However…

I bought the bike thinking I would be doing more gravel riding than I have ultimately done. I really just like getting out on the open road. My rides are generally 30-50 miles nonstop averaging about 16-17mph.

Question:
Would changing the 700x32 tires that came on the bike to 700x30 or possibly 700x28 make a big difference on asphalt?
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Old 03-18-16, 11:08 AM
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The delta in weight might be more significant than size.

I assume tires intended for gravel riding are more robust than roadies, and that means more weight.

A nice set of folding 28s could make a difference.

I use Specialized Turbo Pro slicks and I love them...
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Old 03-18-16, 11:18 AM
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Ya what tires are you currently running? If they're the stock tires they have:
four levels of flat prevention because nobody likes to get flats.
Then pretty much any other tire is going to be faster. Those bontragers sound like slugs, but very durable. I can't find a consistent weight but it seems they're around 550 grams?

The size isn't going to make much of a difference as weight and suppleness. I'd look at something from compass or panaracer in similar size so you can still get into some gravel but ride better on the road. FWIW, the compass 700x32 stampede pass is 291 grams.
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Old 03-18-16, 11:54 AM
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I looked up the stock tires and it looks like the 700x32 have sidewall knobs and has a 60 tpi casing at 542 grams. You could switch to 700x25 or 700x28 road slicks that will be about 300 grams lighter per pair as well as choosing a higher tpi that would be a more supple ride.

I have friends that sometimes ride their cross or gravel bike with cross/gravel suited tires on the road in the group, and they all acknowledge that it's a bit more energy to stay with the group on those tires, even when their gravel/cross bike fit is similar to their road fit (so it's not a matter of catching more air resistance).
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Old 03-18-16, 01:27 PM
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Put on some high quality 25mm tires (Continental GP 4000S, Schwalbe One, or the like) Dial in a little more aero position, assuming you're currently set up a little more upright for off road, and you'll be virtually as fast as any road racing bike.
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Old 03-18-16, 01:32 PM
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Originally Posted by merlinextraligh
Put on some high quality 25mm tires (Continental GP 4000S, Schwalbe One, or the like) Dial in a little more aero position, assuming you're currently set up a little more upright for off road, and you'll be virtually as fast as any road racing bike.
Yep.
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Old 03-18-16, 03:58 PM
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Originally Posted by merlinextraligh
Put on some high quality 25mm tires (Continental GP 4000S, Schwalbe One, or the like) Dial in a little more aero position, assuming you're currently set up a little more upright for off road, and you'll be virtually as fast as any road racing bike.
What if he isn't into virtual riding..?
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Old 03-18-16, 04:52 PM
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I've got a Trek Boone and simply rotate tires for the ride. With 25 GP 4000ss, the bike is not the limiting factor. I love this bike b/c I can essentially ride anywhere just by changing out tires. Well I actually have a couple sets of wheels so I just change the wheel for the ride.
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Old 03-18-16, 05:22 PM
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Originally Posted by leftjohn
Question:
Would changing the 700x32 tires that came on the bike to 700x30 or possibly 700x28 make a big difference on asphalt?

Answer:
No.
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Old 03-18-16, 09:31 PM
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Noticeably faster. As above, try Conti 4000s II in 25mm. Try 100 lbs. in them to start with. I think you'll like it. That's a straight-up road tire. It'll ride some gravel as long as it's fairly smooth.
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Old 03-19-16, 04:02 AM
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Originally Posted by Carbonfiberboy
Noticeably faster. As above, try Conti 4000s II in 25mm. Try 100 lbs. in them to start with. I think you'll like it. That's a straight-up road tire. It'll ride some gravel as long as it's fairly smooth.
GP4000s II come in 28mm now. Roll a little nicer than the 25s
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Old 03-19-16, 04:20 AM
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It will not be noticeably faster. My average mph is the same if not faster on my 24 pound, 30 year old bike with a 6 speed freewheel, DT shifters, 27 inch wheels and 1 1/4 (32c) treaded tires as it is on my 17 pound alu bike with a 10 speed cassette and 25c slick tires. Going from 32 to 28-30 won't make you faster assuming you aren't a UCI World Tour level rider.

My crusing speed is usually over 20mph. No pause button on my computer.





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