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The TS-15 turns the PRS-15 Repair Stand into a convenient wheel
truing stand. Easy to install and use, the TS-15 allows truing of
wheels from 16" to 29".
INSTALLATION
Tools required: 4mm hex wrench.
1) Remove two socket head cap screws on the back of PRS-15's
top tube assembly. Save nuts for reuse.
2) Mount wheel bracket (#6) on left side of top tube assembly using
35mm socket head cap screws (#5) and nuts.
3) Remove extension upright tube from PRS-15. Slide collar and
quick release (#1) onto extension upright.
4) Install gauge (#3) onto collar with knob and shaft (#2).
NOTE: To avoid damage, slide collar to top tube and remove gauge
from TS-15 before folding PRS-15 Repair Stand for storage or transport.
SET UP
1) Inspect rim for cracks, bulges, dents and flat spots. Check for
broken or loose spokes, and for nipples that may be rounded or
rusted. Make sure hub is adjusted properly and axle is not bent.
Repair or replace parts as needed.
2) Lubricate each nipple. Clean excess lubricant from rim.
3) Use a spoke wrench properly sized to fit the wheel's spoke nip-
ples. Park Tool Professional Quality Spoke Wrenches are recom-
mended.
4) When mounting wheel in TS-15, always lock wheel to bracket
using wheel's quick release or axle nut.
NOTE: To operate properly, lever of quick release must always be
positioned on side of wheel bracket (#6).
LATERAL TRUING BASICS: CORRECTING SIDE TO SIDE ERRORS
1) Remove tire (if desired). Place wheel into "V" notch of bracket
and lock with wheel's quick release or axle nut.
2) Position tip of gauge to sidewall of rim. Spin wheel slowly and
look for side to side wobbles. Locate largest wobble.
3) If rim wobbles to the right, tighten left side nipples within area of
wobble 1/4 turn. If rim wobbles to the left, tighten right side nip-
ples within area of wobble 1/4 turn. Spin wheel and note impact.
Repeat as needed to remove wobble. Note: If further tightening
could cause nipple damage or create uneven spoke tension, sim-
ilar results can be achieved by loosening the opposite side nip-
ples 1/4 turn within area of wobble (for example, if rim wobbles
to the right, loosen right side nipples within area of wobble).
4) Repeat procedure on other wobbles until wheel runs straight.
RADIAL TRUING BASICS: CORRECTING ROUNDNESS ERRORS
1) Remove tire. Place wheel into "V" notch of bracket and lock with
wheel's quick release or axle nut.
2) Position gauge to rest just under outside edge of rim. Spin wheel
slowly and look for areas where rim moves toward gauge (high
spot) or dips away from gauge (low spot).
3) If rim has a high spot, it needs to be pulled away from the gauge.
PARK TOOL CO.
6 Long Lake Road
St. Paul, MN 55115
www.parktool.com
Tighten nipples within area of high spot 1/4 turn. Check result
and repeat as needed until high spot is removed.
4) If rim has a low spot, it needs to be pushed toward the gauge.
Loosen nipples within area of low spot 1/4 turn. Check result and
repeat as needed until low spot is removed.
5) Adjustments made to correct high and low spots may have
affected lateral true of wheel. Re-true as needed until wheel is
both straight and round.
WHEEL DISHING BASICS: CENTERING RIM BETWEEN HUB LOCKNUTS
1) Remove tire. Place wheel into "V" notch of bracket and lock with
quick release or axle nut. Wheel must be laterally true before
checking dish.
2) Position tip of gauge to sidewall of rim.
3) Without changing position of gauge, loosen quick release lever
(or axle nuts) and lift wheel from stand.
4) Flip wheel and return to stand. Tighten quick release or axle nuts.
5) If tip of gauge just touches sidewall of rim (as in step 2), rim is
centered between hub locknuts and wheel is properly dished. If
there is a gap between gauge tip and rim, or if gauge pushes
against rim, the rim must be moved left or right in order to center
it between locknuts of hub.
6) To move rim to the right, tighten all right side nipples 1/4 turn. To
move rim to the left, tighten all left side nipples 1/4 turn. If further
tightening could cause nipple damage or create uneven spoke
tension, similar results can be achieved by loosening opposite
side nipples 1/4 turn (for example, to move rim to the right, loosen
all left side nipples).
7) If necessary, repeat steps 1 – 6 until wheel is properly dished.
NOTE: An alternative to using the "flip" technique described above
is to use a wheel dishing tool, such as the Park Tool WAG-3 or WAG-
4 Wheel Dishing Gauge.
PRE-STRESSING: RELIEVING SPOKE WIND-UP
After truing, spokes should be pre-stressed in order to relieve spoke
wind-up that occurs as nipples are turned. To pre-stress, tightly
squeeze parallel pairs of spokes all the way around wheel. This may
cause wheel to go slightly out of true. If so, re-true as needed.
SPOKE TENSION BASICS: THE KEY TO A RELIABLE WHEEL
Wheels that are strong, reliable and long lasting have spokes that
are properly tensioned. Too little tension results in shortened spoke
life and frequent re-truing. Too much tension can result in deformed
and/or cracked spoke nipples, rim holes, and hub flanges. Relatively
great differences in tension between spokes will result in a wheel
that is not laterally stable and that will go out of true frequently.
While it is possible to "feel" spoke tension by squeezing pairs of
spokes, tension is best determined by use of a tension meter, such
as the Park Tool TM-1 Spoke Tension Meter.
For more information on the TS-15 and for detailed wheel truing
instructions visit: www.parktool.com
TS-15
WHEEL TRUING
STAND
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