User manual GIANT BICYCLES XTC BIKES-2001

[. . . ] NRS TM TM rear suspension system. NRS (No Resonance System) bikes are equipped with dedicated RockShox SID rear shocks. These SID shocks have separated "positive" air chambers (spring) and "negative" air chambers (spring). The positive springs' main function is to absorb the shock impact. The negative spring (which is much smaller) makes the positive spring function smoothly and prevents a harsh top out feeling when the shock returns to its original position. [. . . ] WARNING: IMPROPER ADJUSTMENT OF REAR SUSPENSION SHOCKS CAN RESULT IN UNSTABLE CONDITIONS OR LOSS OF CONTROL. How to set up the rear shock correctly with "zero-SAG", in order to maximise the efficiency, comfort & TM control of an NRS bike. Try the air pump on the valves and make sure the air pressure opens the valves, air goes into the air chamber and does not stay in the pump hose. Try to find out your exact body weight including cycling gear (clothing, helmet, shoes, cycling bag. . . . . . . ). Check the following table to find the correct "positive" and "negative" air pressures, depending on your weight: "MARATHON" setting "PRO RACING" setting single position XtC Team, XtC Mt. Snow, XtC Big Bear 3¾" travel position "2" position "1" XtC Mammoth, XtC Napa 3¾" travel 3" travel Body Weight 50 kg. Negative air pressure 50 psi 50 psi 50 psi 50 psi 50 psi 50 psi 50 psi 50 psi 50 psi 50 psi 50 psi Positive air pressure 120 psi 135 psi 145 psi 155 psi 165 psi 175 psi 195 psi 205 psi 220 psi 230 psi 250 psi Positive air pressure 120 psi 135 psi 145 psi 155 psi 165 psi 175 psi 195 psi 205 psi 220 psi 230 psi 250 psi Positive air pressure 95 psi 105 psi 115 psi 125 psi 135 psi 145 psi 155 psi 165 psi 175 psi 190 psi 205 psi - Pag. 17. Inflate the air chambers until the correct pressures have been reached. Start with the negative spring (LOWER VALVE, on the small diameter of the shock) and next the positive spring (TOP VALVE on the large diameter of the shock). It is impossible to take into consideration deviations in the air pump gauge and the rear shock. Therefore we suggest making the following simple steps, which offer two more ways to achieve the 100% correct setting. The finishing touch to get to the "zero-SAG" setting will give the optimal efficiency and the best performance. It is important to understand that the shock should be delicately set on the edge of "zero-SAG" and not with too high positive pressure. Therefore this procedure goes from a little bit too low positive air pressure to just enough positive air pressure to achieve "zero-SAG". Put the bike against a wall and make sure there is a zip tie or O-ring around the rear shock piston. Push gently one of the pedals, like you would do during real riding (while keeping the front wheel locked with the front brake). Shift your body weight gently from the saddle to the front fork and try to dismount without causing too much movement in the bike. TM REMEMBER: FOR MAXIMUM EFFICIENCY THE NRS SYSTEM SHOULD ALWAYS BE SET UP WITH ZERO "SAG" !!!Increase the pressure of the positive spring in repetitive steps of 5 or 10 psi. following the points 7, 8 and 9 until "zero-SAG" is reached. TM It is essential to set up the NRS system with zero "SAG". Here's the final check: ride the bike with TM NRS system with a relatively high RPM on a nicely paved road. In case the bike tends to "bob" with small motions, then increase the positive spring by another 10 psi. [. . . ] Negative air chamber: there may be a decal on the shock, showing air pressure range: "set negative spring to approx. To increase or control the air pressure of the shock, a special air pump is needed. (See figure 4: the pump on the picture may be a different one from the pump that comes with the bikes). Figure 4. TOP INDEX - Pag. Cleaning and maintenance. Proper maintenance of a Giant XtC dual suspension bicycle is important to insure years of trouble free safe riding and enjoyment. [. . . ]