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Many mountain bikers considering
riding on the road whether it be for training, riding in groups
or just for a change from the mud in the winter, are often blissfully
unaware of the need to size themselves "accurately"
for a road bike. Even Road cyclists are unaware of the basics
until they get sore back or stiff neck.
Often
it's a case of "yep, seems OK, off we go". An hour later
your back is in agony, shoulders and arms aching, bumb sore in
places you didn't realise you had and upon arrival back home -
bosh, road bike is chucked in the corner of the garage or shed
never to see the light of day again.
Real shame. Coming from off-road riding
myself I now find road riding and racing great fun, totally different
infact, but have to admit the back, shoulders, arms and bum mentioned
above were my own.
I'm glad to say however the bosh bit didn't happen and I now mix
my riding between road and off-road but with a strong preference
now for road.
I think it's an age thing. As you get older, cleaning the bike
becomes more of a chore, particularly as with age you grow to
realise the necessity to correctly maintain your bikes.
Sizing yourself for a road bike
is completely different to sizing a mountain bike. There are five
simple guidelines that will guide you to an accurate fit but remember,
they are guidelines and you will need to tweak even these to get
your road bike to fit comfortably.
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Tip 1 - Frame fit There
are many theories around. The two simplest are either, whilst
barefoot, to measure your inside leg measurement from crotch
to floor and take two thirds of that measurement or easier
still ensure you have an inch of clearance between the top
tube and your crotch (you don't need the 3-6 inches like
you do on a Mountain bike)
You then need to know how to measure
a frame. The frame size is determined by the distance between
the top of the seat tube (a) and the middle of the bottom
bracket (b). My suggestion however is measure it yourself,
rather than take manufactureres measurements as these can
vary. |
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Tip 2 - Saddle height
Sit on the bike in the position
you usually adopt. Set the saddle height so that your leg
is just short of fully extended at the bottom of the pedal
stroke and your hips don't rock from side to side as you
pedal. This is often only a very rough guide as professionals
at the start of the season will spend weeks adjusting this
until they get it as perfect as they can. If you are into
long distance riding many who do this set up with a centimetre
or two lower than this to aid comport. Spend time getting
this one right.
Your knee should be slightly (a)
with your heel on the pedal (b) and the cranks in line with
the seat post. |
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Tip 3 -
Saddle position Move your saddle back and forth
until your knee is directly over the pedal axle when your
cranks are horizontal. Recent changes in the geometry of
some bikes designed for triathlon have brought into question
the real need to concern yourself over this theory but better
to start here and be safe than be sorry and ache.
Make sure it's the centre of your knee (a) that drops a
plumb line down to the pedal. |
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Tip 4 -
Saddle tilt Ever felt you were slipping forward
all the time - check your saddle tilt. This adjustment is
vital to prevent you from putting too much weight on your
arms and shoulders as you struggle to keep you bum back
on the saddle. Your seat should be level or some riders
prefer it set with the nose tilted slightly upwards ( I
said slightly).
Check this adjustment by using as striaght edge balanced
on the saddle whilst the bike is on level ground. Daft statement
you may say, but I have seen people checking this whilst
the bike was in a repair stand! |
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Tip 5 -
Handlebar reach The old neck protector, get this
wrong a you can get a real life pain in the neck. Again
it's largely down to what feels right. Ensure you don't
feel too cramped or too stretched. There are many ways of
getting an initial feel. Try setting the stem one or two
inches below the saddle. Then use a stem that puts the bars
just ahead of a vertical line dropped from your nose whilst
riding on the hoods. On the drops the handlebars should
block your view of the front hub.
Many text books say your back should be at a 45 degree
angle to the top tube (a) whilst riding on the hoods. Certainly
use this as a start point to get comfortable then adjust
to suit your style of riding. |
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Tip 6 - A special note
Often overlooked by many cyclists.
Once you've achieved your ideal sizing - record it. Particularly
if you are in the habit of removing seat posts etc. to maintain
your bike. Use a tape measure to record key dimensions and
don't be afraid to mark seatposts, stems etc. with magic
markers before removing them from your frame. Believe me
it makes sense. |
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