The document discusses the requirements and design of road wheels. It notes that wheels must minimize air loss, transmit drive to the road, and be removable. It lists additional requirements like withstanding driving forces. The document describes different wheel rim designs like aluminum alloy, pressed steel, and wire spoke rims, noting advantages of each. It also defines types of rim designs like two-piece, three-piece, and split rims, providing details on each. Finally, it poses and answers questions about wheel requirements and checks.

1. WWhheeeellss aanndd TTyyrreess
PPaaggee 11

2. TThhee rrooaadd wwhheeeell ffuullffiillss mmaannyy
rreeqquuiirreemmeennttss,, ttoo mmiinniimmiissee aaiirr
lloossss aanndd ttoo ttrraannssmmiitt ddrriivvee ttoo tthhee
rrooaadd iinn ccoonnjjuunnccttiioonn wwiitthh tthhee ttyyrree
aarree ttoo nnaammee aa ffeeww..

3. Name other rreeqquuiirreemmeennttss ooff tthhee
rrooaadd wwhheeeell::
• To be easily removable
• Has to be able to withstand the forces
which occur during driving – cornering,
braking etc.
• Easy to clean
• Allow cooling to the brake disc
• Allow tyre fitting and removal
• Cheap to produce

4. Label tthhee ttyyppeess ooff wwhheeeell ddeessiiggnn
bbeellooww aanndd ssttaattee aaddvvaannttaaggeess ooff
eeaacchh ttyyppee::

6. AAlluummiinnuumm aallllooyy wwhheeeell
• Light in weight
• Allow good air flow to brakes
• Attractive appearance

8. PPrreesssseedd sstteeeell rriimm
• Cheap to produce
• Easy to clean
• Strong – harder to scratch or damage

10. WWiirree ssppookkeedd rriimm
• Attractive appearance
• Easy to remove and refit
• Strong and light in weight
• Good air flow to brakes

11. TThheerree aarree mmaannyy ddiiffffeerreenntt
ccoonnffiigguurraattiioonnss ooff rriimm ddeessiiggnn.. AAllll
ooff tthhee aaffoorreemmeennttiioonneedd
rreeqquuiirreemmeennttss aarree aa ddeessiiggnn
ffeeaattuurree iinn tthhee rrooaadd wwhheeeell..

12. Name the ddiiffffeerriinngg ttyyppeess ooff rriimm::
• Two piece rim
Removable
flange (spring
flange) Flat rim
base

13. • Three piece rim.
• Used on
commercial vehicles
which used to have
very stiff tyre
sidewalls.
Removable flange
(endless flange)
Flat rim
Locking rim

14. • Split rim
These bolts hold the two rims
together and should not be
removed until the tyre is
deflated

15. QQuueessttiioonnss
1. Name an advantage of aluminum rims
over steel rims.
2. Name an advantage of steel rims over
aluminum rims.
3. Name 2 requirements of a wheel.
4. Why are the bolts which bolt the split rim
together painted red?
5. Name a check which would be carried
out on a wheel during a service.

16. AAnnsswweerrss
1. Looks better, better cooling to brakes, lighter
unsprung weight
2. Cheaper to produce, harder to damage, easier
to clean
3. Enable tyre removal, has to be easy to
remove/refit, allow cooling to brakes, withstand
driving forces
4. To highlight the fact that they are not the wheel
removal bolts – safety
5. Check torque of nuts/bolts, check rim for
damage/buckling