Hi Wayne,
My experience has been riding a MTB with knobby tires, a MTB with slick
tires, and a touring-style road bike with 700x28 tires. This is with a
rigid MTB and I'm sure you'll notice more efficiency jumps getting away
from the front suspension. I noticed a bigger efficiency gain going to
the slick tires than I did going to the road bike, but here's the
things I did notice:
1. The big ring on the MTB is not big enough esp with downhill or a
tailwind, so the road bike will offer bigger gears than your MTB
probably does.
2. Drop bars make a huge difference in a headwind.
3. Going uphill is much easier on a lighter bike.
So while I'd say my speed gain was significant in losing the knobby
tires and smaller but still noticeable going to the road bike. There is
also a significant difference in terms of comfort for long rides on the
road bike. This is from having different hand positions but also it
seems to require less effort to go the same speed. (I also got clipless
pedals on the road bike which also help!)
As for double or triple depends on what you want to do with the bike,
if you want to mostly go fast go for the lighter weight of the double.
A triple is essential for loaded touring in hilly areas. With 20 lbs of
camping gear strapped to your bike you want an easier gear tackling the
same hill!
Tanya
Wayne said:Hi,
I'm seriously considering buying a road bike this year. I've been
riding
Quoted message said:my MTB for a few years now and although I do occasionally ride
off-road I
Quoted message said:spend most of my time on-road. I commute on it almost daily and enjoy
weekend rides of around 30 miles (I've done upto 50 miles on it but
was
Quoted message said:pretty knackered!) so I'm thinking road bike - it's got to be less
effort
Quoted message said:right or am I?
I love the look of road bikes which I guess is good enough
reason to buy one :-) but seriously, reading some threads about road
bikes
Quoted message said:compared to MTB's suggest I may be disappointed; admittedly they
talked
Quoted message said:about putting slicks on the MTB and then said there's little
difference in
Quoted message said:efficiency but it just don't seem right! My MTB is a rockhopper with
front
Quoted message said:sus. now I don't know what it weighs but surely the weight alone
would be
Quoted message said:noticeable on a climb? Anyone out there had any experience with this?
Quoted message said:How about the rolling resistance comparing normal nobbly MTB tyres on
an
Quoted message said:MTB to a road bike on road tyres ???
Someone also told me the fact that the wheel diameter itself reduces
resistance too, is that true?
The other thing I'm wondering about is whether I should buy one with
a
Quoted message said:double or triple chainset; On steep climbs I generally use the middle
front chain ring (I think its 36 teeth) and 4 - 5 on the rear, the
granny
Quoted message said:ring I save for off-road vertical climbs! So is there a comparable
gear on
Quoted message said:a double chain ring that would give me something similar to the above
gear
Quoted message said:selection or are we talking out of the saddle climbing if I go for a
double?
Thanks
Wayne.