Single chainrings are pretty much becoming the accepted norm
on mountain bikes. In fact when I see a double or triple crankset on a bike it
looks a bit weird. Just as 26inch wheels now look about as old fashioned as a
penny farthing.
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10x1 set-up on my road bike! |
However, swapping the road bike over to a x1 drivechain is
still a bit of a departure from the norm. The advantages are still the same;
lower weight and less things to go wrong, which is especially relevant on a
winter commuting bike. My journey to work is essentially flat, limiting the
impact of the reduced gear range,
although hilly Sunday group rides might prove more of a challenge. Loss of gear
range was the same worry when I moved to a 1x10 drivechain on the mountain bike,
but I quickly adapted and have never yet resorted to walking! Of course on the
road there is also the added risk that having struggled over the climb, that you might spin out while chasing your friends back down the other side! Luckily I don't live in the alps, the longest climbs and descents on the South Downs are just a handful of minutes.
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Rotor QX1 42t ring |
All three of my bikes now use oval rings, as I am totally
sold on the advantages of the smooth spinning style it creates. So I have
fitted a 42 tooth Rotor oval chainring, which is designed for cyclocross, and
fits a standard compact 110BCD crank. The chainring uses Rotors alternating fat
/ thin tooth design to retain the chain without need for a chainguide. I’ve
been running a single ring with no chain retention device on my MTB for
several years without a single dropped chain. Even without a clutch rear mech
and with a very worn chain I haven’t had problems on the second bike either, so
I’m confident that supposedly smooth tarmac won’t present any issues.
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XT 11-32 10 speed cassette |
The rear cassette is a 10 speed Shimano XT 11-32. This gives
a broad range of gears while only just creeping outside of the quoted 30 tooth maximum
specification of my 105 rear mech. Feedback on internet forums suggested it
would be ok and it shifted fine across the range on my first commute. The steps between gears are
more noticeable on the road, so it will be interesting to see how the wide
range cassette rides when pushing hard. An even broader range of gears could be achieved in the
future with a new mech and 11-34 or 11-36 cassette, if I find the need for more
gears going uphill.
The first few rides have gone well. I've purposely sought out some of the toughest climbs in the area to check out the bottom gear. It's going to make a few climbs harder but I’ll report back in a few months and let you know how the
experiment works out.