Infinity BMX BICYCLES, Руководство пользователя

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Before You Ride Before You Ride
Correct Frame Size
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Riding Position
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CORRECT FRAME SIZE
When selecting a new bicycle, the correct choice of frame size is a very important safety conideration. Most full sized bicycles come in
a range of frame sizes. These sizes usually refer to the distance between the center of the bottom bracket and the top of the frame seat
tube.
For safe and comfortable riding there should be a clearance of between 25mm and 50mm between the groin area of
the intended rider and the top tube of the bicycle frame, while the rider straddles the bicycle with both feet flat on
the ground.
The ideal clearance will vary between types of bicycles and rider preference. This makes straddling the frame when off the saddle easier
and safer in situations such as sudden traffic stops. Women can use a men’s style bicycle to determine the correct size the women’s
model.
The following chart and diagram will help you make the correct choice.
Approximate Rider Leg
Lenth
Suggested Frame Size for
Racing/Touring Bicyle
Suggested Frame Size for
Mountain or Hybrid Bicycle
24 – 27 inches / 61 – 69cm – 14.5 inches / 37cm
26 – 30 inches / 66 – 76cm – 17 inches / 43cm
28 – 31 inches / 71 – 79cm 19.5 inches / 50cm 18 inches / 45cm
30 – 33 inches / 76 – 84cm 21.5 inches / 55cm 19.5 inches / 50cm
31 – 34 inches / 79 – 86cm 22.5 inches / 57cm 20.5 inches / 52cm
32 – 35 inches / 81 – 89cm 23.5 inches / 60cm 21–22 inches / 53 – 56cm
34 – 37 inches / 86 – 94cm 25 inches / 63 cm 23 – 23.5 inches / 58 – 60cm
not less than 1 inch
RIDING POSITION
Saddle Height
In order to obtain the most comfortable riding position and offer the best
possible pedaling efficiency, the seat height should be set correctly in
relation to the rider’s leg length. The correct saddle height should not allow
leg strain from over extension, and the hips should not rock from side
to side while pedaling. While sitting on the bicycle with one pedal at its
lowest point, place the ball of your foot on that pedal. The correct saddle
height will allow the knee to be slightly bent in this position. If the rider then
places the heel of that foot on the pedal, the leg should be almost straight.
Ensure that the seat pillar does not extend beyond the
minimum insertion mark.
(Refer to p.65 on how to adjust seat height.)
Reach
To obtain maximum comfort, the rider should not overextend his or her
reach when riding.
To adjust this distance, the position of the seat can be altered in relation to
the seat pillar. (Refer to p.65 on how to adjust the seat clamp.)
Maximum Height / Mini-
mum Insertion Mark
(Should not be visible)
Arms not over-
extended
Handlebar stem
height about the
same as
seat height
Pedal at
bottom position