Originally Posted by
SquidPuppet
+1
The difference in ride quality between a 35mm tire and a 45mm tire is significant. Big time!
I you are racing or timing your rides, skinny tires have the advantage of being lighter and more aero. You need 'em.
If you are riding for exercise or recreation, why not use a tire that won't beat your butt and spine? Larger tires also offer increased cornering grip.
These are 45mm 100% treadless slicks. Grip is silly sticky. They look dead sexy in black or gumwall.
Specialized Bicycle Components
Or if you want to go all the way to 53mm (2.1"), these are for you.
Amazon.com : FREEDOM TIRES FRDM THICKSLICK 29x2.1 DELUXE WIRE : Sports & Outdoors
A lot depends on what size, and where you put them..... A 35mm tire on the front will have little to no effect on ride comfort, compared to a 45-47. On the rear, it is huge and feels like riding on a rock! A 40mm tire feels the same as a 45 on the back, so offers comfort and capacity, where you need it, and won't affect handling!
But that 35mm tire on the front will improve quickness of steering and precision, where anything bigger won't.
By mixing sizes, you get the best of both worlds - comfort, and precision!
I run a 35 Schwalbe Marathon Supreme on the front of my Crosstrail, and a 40 on the back - It is completely transformed from the 45s that came OEM. While, still remaining the same - without the knobs!
From the OPs post, I take it he was trying to slightly roadify his hybrid, and this will help, and be noticeable. If he wants to keep it a cruiser, leave the knobs or put fat road tires on it.
MHO