t78-cs air mod-kit

Air Mod-Kit Changing out the 7” poly wheels on the rear of the T78 to 8.5” rubber air tires.

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T78-CS Air Mod-Kit

Disclaimer


This document was written by Trikke Tampa. It’s of our own opinion and example of how to change out the rear wheels on a TRIKKE™ T78CS. This is not an official Trikke Tech, Inc document but is only a guide to be used as a reference.

Trikke Tampa is not responsible for the consumers use of this document. Trikke Tampa will not be held responsible for any damages or injuries that may have resulted in the use of this document. It is to be used at your own risk and responsibility.

If you have any questions or need clarification on any of these instructions please feel free to call us at 813-319-3735 during business hours. You may also email us at [email protected]

Tools Needed and Explanation of Task

• Tools Required• 5mm hex wrench• 3mm hex wrench• 8mm socket wrench or adjustable wrench• Pliers

• Explanation of Task• The Trikke T78CS-GY is designed to accommodate the 7”

poly wheels, 8” poly wheels or 8.5” rubber air tires. There are 3 brake pad axle positions on the frame to accommodate each different wheel diameter, see figure 2. The brake axle will need to be adjusted to the proper position depending on the wheel diameter being installed.

• This manual will give you step-by-step instructions for installing the 8.5” rubber air tire. To install the 7” or 8” poly wheel you can use these same instructions but utilize the appropriate brake axle position on the frame for the wheel being installed.


Figure 1

Figure 2

Overview• Step 1 – Remove existing poly wheels• Step 2 – Loosen brake cable• Step 3 - Remove brake axle• Step 4 – Re-Position brake spring• Step 5 – Re-Install brake axle and pad• Step 6 – Install 8.5” air tire with spacers• Step 7 – Adjust brake cable tension• Step 8 – Test brakes


Step 1• See figure 1.1 Using two 5mm hex wrenches on each

side of the wheel axle go ahead and remove the poly wheel and wheel spacers from the Trikke.

• Do not discard the spacers (steel barrel that spaces between the wheel and the frame) in case you change back to the 7” poly wheels.

• NOTE: The original or longer spacer is only used for the 7” poly wheels. The 8.5” wheel and 8” poly wheel require a shorter spacer (supplied with kit).

Step 2• See figure 2.1 Loosen one of the 3mm screws that

secure the clamp.• Remove the other 3 mm screw that secures the brake

cable clamp. Put in safe place for later re-installation.• Swing the clamp out of the way to cause the wire

brake cable to come lose as shown in figure 2.1.

Figure 1.1

Figure 2.1


Step 3• Using a 5mm hex wrench and 8mm socket or

adjustable wrench remove the 8mm hex nut on the opposite side of the brake axle.

• Pull the brake axle all the way out of the frame and put in a safe place for later use.

Step 4• NOTE: Figure 4.1 Before moving the spring please

read this procedure in it’s entirety. It’s important to note the direction the spring is installed. If installed upside down the brakes will not function properly.

• Figure 4.2 First, move one side of the spring to the furthest small spring hole away. This is the hole that accommodates (allows clearance) the 8.5” wheel diameter.

• Then move the other side of the spring to the adjacent hole.

• By not removing the spring from the Trikke it ensures you are properly installing the spring for the 8.5”wheel.

Figure 3.1

Figure 4.1

Figure 4.2


Step 5• NOTE: Be sure to read this step, in it’s entirety, to fully

understand the task before proceeding.• See figure 5.1 Re-install the brake axle from the

outside of the Trikke towards the inside. • While feeding the axle through be sure the axle is

going through the center of the spring and then into the axle hole of the brake pad.

• As the brake axle exits the opposite side of the brake pad again be sure it goes through the center of the spring and then on through to the adjacent hole of the frame.

• The axle can be difficult to feed through so be patient and DO NOT use a hammer. If necessary you can use the 5mm hex wrench on the brake axle and twist back and forth while pushing and feeding the brake axle through.

• Once the brake axle is all the way through do not install the 8mm hex nut at this time. If you do then it will slightly squeeze the frame together making it difficult to get the 8.5” wheel installed.

Figure 5.1


Step 6• See figure 6.1• It’s imperative that you inflate the 8.5” air wheel to

80psi before proceeding. This ensures the tire is fully inflated before adjusting the brakes on the next step.

• From the outside of the frame insert the wheel axle into the wheel axle hole on the frame just far enough to put the first spacer on the axle as shown in Fig 6.1.

• Put the 8.5” wheel in place and feed the axle through the wheel, see Fig 6.2. NOTE: There is a spacer in the hub of the wheel between the bearings. It may be necessary to spin the wheel axle back and forth with your fingers to allow the wheel axle to go on through.

• Once through the wheel be sure to put the second spacer on the axle before feeding through the frame. There may be extra space between the wheel and frame but it will pull together when the wheel axle is tightened.

• Using two 5mm hex wrenches on each side of the axle go ahead and tighten snugly.

Figure 6.1

Figure 6.2


Step 7• Install and tighten the 8mm hex nut on the brake axle

while being careful not to over tighten.• NOTE: Instead of using pliers it’s preferable to use

only your fingers to pull the slack out of the brake wire cable. However, it can be difficult and cumbersome so we illustrate using pliers. If you use pliers be extra careful not to squeeze too hard or you will fray the cable.

• See Fig 7.1 Carefully pull the slack out of the wire cable while ensuring that all the cable housing ends are properly seated in their recesses at the hand brake lever and cable stays on the steering column.

• Pull downwards on the brake wire cable to cause it to bend around the brake pad. This will help it to hold in place and give clearance for the brake cable clamp.

• While maintaining a gentle and steady pull on the brake cable and causing the brake pad to just touch the tire then use your other hand to swing the cable clamp back over the cable so you can re-install the 3mm screw.

• Continuing to use your other hand, re-install the 3mm screw using your 3mm hex wrench.

• Tighten both 3mm hex screws of the brake wire cable clamp to firmly hold the wire cable in place.

• Remove all tools and inspect your work.

Figure 7.1

Figure 7.2


Step 8• Put the Trikke back in it’s normal upright position.• Squeeze the brake levers several times to stretch the

brake wire cable. • Raise each wheel off the ground and give it a spin to

ensure the brake pad isn’t rubbing the tire. If there is a slight or intermittent slight rub then that should work out after riding for a few minutes and working the brakes.

• If there is excess brake pad pressure against the tire then perform Step 7 again.

• End of task.

Figure 7.1

Figure 7.2


t78-cs air mod-kit

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