Hangtownmatt

Yes, tires will make a difference. However, it isn't necessarily the width of the tire that makes the difference ... it's the weight. Google the weight of your Schwalbe and than google the weight of whatever tire you have on the Tarmac. I wouldn't be surprised if the Tarmacs tires weigh 1/3rd or less than the Schwalbe. Spinning weight has a lot more effect on performance than static weight; such as weight in your pannier. The wheels (rims, spokes and hub) also make a difference. I'd bet money the wheels on your Sam Hillborne's are designed for touring and moderate single track. This is a commuter and camping bike, and I suppose it could also be used for touring.

The Sam Hillborne is a true All Rounder. Many Sam H. owners who don't have a fast bike like the Tarmac will invest in a second set of wheels and tires for the group rides where speed is a priority. It's an easy swap and will transform the characteristics of the bike. But than again there are others who don't. My Bianchi road bike has been hanging on a hook in the garage since the day I brought home my Sam Hillborne. But to each their own. I understand the need for speed. I just don't have it anymore.

Here are a couple good sites to research tires for your Sam Hillborne:

https://groups.google.com/forum/#!fo...w-owners-bunch

https://janheine.wordpress.com/

Just keep in mind lightweight high performance "wide" tires will cost $$$, durability will suffer and flats may become more of an issue. None of which I'm willing to sacrifice on my commute or recreational rides.

I hope this helps,

Matt