36= bike!

Question 1

Fitting a bike needs to be done in a certain order. Arrange the following steps in the order they should be fitted:

Seat fore/aft position
Frame size 
Seat height 
Handlebar height
Seat width
Seat tilt
Handlebar width
Foot position on pedal

Answer 1

1. Frame size
2. Seat width
3. Seat height
4. Foot position on pedal
5. Seat fore/aft position
6. Seat tilt
7. Handlebar width
8. Handlebar height

Question 2

True or false: when getting your bike fitted, you should wear loose-fitting clothing and normal shoes to make sure you’re comfortable for the process

Answer 2

False - wear cycling shorts and shoes

Question 3

To determine frame size, have the patient stand against a wall with a (2/4/6) inch thick book between their (armpits/legs/knees), making sure it’s in contact with the bottom of their ____________.

Next, mark the wall where the (top/bottom) of the book is and measure from the mark to the floor.

Multiple this distance by (0.1/0.65/0.8). This is the frame size.

Answer 3

2"
Legs
Shorts
Top
0.65

Question 4

What is the most important angle when assessing frame dimensions?

A) Head angle
B) Seat angle
D) Stay angle
D) Down tube angle

Answer 4

B - should be 72-74deg to ensure patella is over pedal spingle when crank is forward and horizontal

Question 5

True or false:
Your patient has correctly chosen the correct frame size. However, they have unusually long femurs relative to their tibia. The patient should therefore choose a frame that has a small seat angle

Answer 5

True

Long femur - smaller angle
Short femur - larger angle

Question 6

If the correct size of frame has been chosen there should be around \_\_\_\_\_\_\_ inches ofseat post showing when the seat height is adjusted.
A. 1-2
B. 2-3
C. 4-5
D. 6-7

Answer 6

C

Too much post showing: dangerous bc there may be little seat post in seat tube, can snap causing rider to fall

Too little post: can’t lower seat post enough to reach pedals

Question 7

A minimum of (3/6/9) inches of clearance is required when straddling the top tube of a mountain bike. Why?

Answer 7

3; Common to be forced off the seat when mountain biking - need to be able to get feet on the ground easily

Question 8

How can you determine the frame size of a mountain bike?

Answer 8

Measure inseam length`

Question 9

Why is the head tube steeper in mountain bikes?

Answer 9

Greater steering responsiveness

Question 10

Why is the crank arm often longer in a mountain bike vs road bike?

Answer 10

To improve the moment arm for climbing steep grades

Question 11

How do you determine the optimal saddle height?

Answer 11

Hold 2” book between legs in front of a wall. Mark top of book then measure to floor. (same as with determining frame size)

Multiply by 0.88-1.09 (depends on comfort)

Question 12

Once the seat height has been chosen, the angle at the knee should be \_\_\_\_\_ degreesof flexion, when the crank is at the bottom dead center.
A. 5-10
B. 10-20
C. 25-30
D. 35-45

Answer 12

C

Question 13

What structures are negatively affected if seat height is too high? Too low?

Answer 13

High: hyperextension of knee causes stretching of musculature and posterior knee pain

Low: overworking quads causes compression of patella and anterior knee pain

Question 14

True or false: When the cleats are adjusted, the first metatarsal head should sit right over the top of the pedal axle.

Answer 14

True

Question 15

If a patient reports having calf/achilles pain, what modification can be made to require less muscle activation when pedaling? What is the drawback?

Answer 15

Place met head in front of the axle to produce shorter moment arm at the ankle joint

Con: more difficult to pedal at higher cadence

Question 16

True or false: If the correct saddle width has been chosen, the ischial tuberosities will be located justlateral to the seat on both sides.

Answer 16

False - should be on the seat

Question 17

To determine fore/aft position, move the seat forward or backward until the patella lines up with the _____________ ______________ when the crank is in the (forward/backward) (vertical/horizontal) position

Answer 17

Pedal spindle; Forward; Horizontal

Question 18

A patient tells you they are planning to do a long bike ride today which involves climbing a huge hill. You suggest to they move their seat (forward/backward) to maximize torque

Answer 18

Backward

Question 19

What happens if the seat is too far back? Too far forward?

Answer 19

In both scenarios, some force is being wasted and not contributing to pushing pedal down.

Too far back: forces trying to “stretch” the crank shaft
Too far forward: forces trying to “compress” the crank shaft

Question 20

If a patient has a leg length discrepancy you should adjust for the (short/long) leg.

If they have a short tibia, you can use a __________ in their shoe or a ______ on the pedal.

If they have a short femur, you can adjust with _________________ position of the foot on the pedal.

Answer 20

Long; lift; shim; fore/aft

Question 21

A patient has a short right femur. How can you adjust their bike to avoid injury?

Answer 21

Adjust seat height to match right (long) femur side. Then move cleat on short femur side toward the toe so foot can reach pedal without extending leg.

Note: this increases the moment arm on the ankle joint and may lead to excess strain on the posterior compartment of the right leg

Question 22

True or false: The seat of the bike should be angulated upwards to avoid causing urogenitalproblems from the seat causing pressure on the perineum.

Answer 22

False - should be angled downward. Upward often causes LBP

Question 23

How high should the handlebars be relative to the saddle?
A) 1-2 inches higher than the saddle
B) Same height as saddle
C) 1-2 inches lower than the saddle
D) 3-4 inches lower than the saddle

Answer 23

C - unless its a really tall cyclist then will be as much as 4 inches

Question 24

Ideally, the PSIS and shoulders should be at the same height. What is an exception to this?

Answer 24

Rider is experiencing hand numbness - should raise handlebars

Question 25

True or false: the distance between the saddle and handlebars is a matter of personal preference

Answer 25

True (but in general the riders nose should intersect with the head tube where it splits with the front forks, and arms should be bent to about 15deg)