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4MyCycle Mini Bike Pump

Useful Details for Owners regarding Presta & Schrader Configurations

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Bike Tire Valve Types

The 4MyCycle Mini Bike Pump is equipped to cater for the two popularbike tire valve types.

These are:A) PrestaB) Schrader

The following will assist in identifying the valve type used on your bike:

Presta versus Schrader: (Courtesy Wikipedia)Presta valve stems are 6 mm diameter, whereas Schrader valve stems forbicycle tyres are 8 mm, thus requiring a larger diameter hole in a bicyclerim. While not a concern on wider bike rims, it will weaken a narrow wheelrim, precluding their use on (road) racing bicycles.

The Presta ValveCommonly found on Road Bikes:

The Schrader ValveCommonly found on bikes with wider

rims – such as Mountain, Hybrid ,BMX and Cruiser Bikes

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The 4MyCycle Mini Bike Pump head is easilyconfigured for either Presta or Schrader Valves.

** IMPORTANT NOTEThe 4MyCycle Mini Bike Pump comes factory-delivered in Schraderconfiguration.

The simple steps for conversion between valve formats involve thefollowing:

1. Undo the Knurled Nut (the “Mouth”) of the pump head,2. Remove the Valve Top and the Valve components.3. Align these two items to suit the format you require (see diagrams

on the following pages)4. Re-insert these components back into the Pump Head,5. Screw the Knurled Nut (the “Mouth”) of the pump head back into

place.

No special tools are required – all the changes can be made with your ownfingers. The Knurled nut needs only be finger tight to ensure an airtightseal.

Please see the following pages for a detailed description, diagrams andphotographs of the components and the orientations required for bothPresta and Schrader formats.

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Configuration details for Presta/Schrader Valves

The following pages are provided to assist owners to clearly identifycomponents of the 4MyCycle Mini Bike Pump - and clarify componentorientation requirements for both Presta and Schrader valve formats.

A graphic which appears on the rear of the packaging that comes with the4MyCycle Mini Bike Pump, is a diagram of the components in the order ofassembly for each of the two valve types (Presta and Schrader).The diagram is shown below with added numbering to assist in identifyingthe items:

The items by number are as follows:1. Mouth Section – the Knurled nut2. Dust Cap3. Seal Ring – an “O” Ring (fits on knurled nut above the screw

threads, directly under the knurled section of the nut)4. Valve Top – a Rubber housing (cross section view)5. Valve – a Hard Plastic extrusion6. Chrome Plated 4MyCycle Mini Bike Pump Head

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In Photographic Form:

The photo representation below shows the alignment and assembly of the4MyCyle Mini Bike Pump head components for use with Presta andSchrader valve types.Note that the Seal Ring (Item 3) is shown already fitted to the MouthSection - Knurled nut, (as will be the case when changing the pump headbetween Presta and Schrader formats).

1&3

2

4

5

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Presta Schrader

The items by number are as follows:1. Mouth Section – the Knurled nut2. Dust Cap3. Seal Ring – an “O” Ring (fits on knurled nut above the screw

threads, directly under the knurled section of the nut)4. Valve Top – a Rubber housing5. Valve – a Hard Plastic extrusion6. Chrome Plated 4MyCycle Mini Bike Pump Head

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Larger View:A larger view of the components ready for insertion into the 4MyCycleMini Bike Pump head for both Presta & Schrader valve formats

Presta Format Schrader Format

Pump Head showing housing into which the above components are inserted

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And - a slightly different view:

For use with Schrader Valves:

For use with Presta Valves:

Pumping

The side with thebigger hole facing

out

The Pointedside facing

out

The Pointedside facing

in

The side with thesmall hole facing

out

Before inflating your tire, please make sure of the following:1. Ensure that the pump head is well seated over the

tire valve.2. Raise the wrench lever to lock the pump head onto

the tire valve.Then commence pumping to inflate your tire,supporting the pump head and tire valve with your handas shown.

Once your tire is inflated as desired, remove the pump by:1. First unlocking the pump head from the tire valve by

lowering the wrench lever.2. The pump can then be removed from the tire valve.

DO NOT remove the pump by the use of force beforelowering the wrench lever, as this can damage both thepump components and the tire valve stem.