Large to Standard Bore Adapter- internal type - 6-17-589
- Internal adapter. From large to standard valve. With gum, rubber seal.
Internal Reducer for EM Valve Inflation
Approx. 8 mm thread, rubber seal included | Screws into a large-format valve | Sold per piece
This internal reducer solves a common problem in shops that service large-format wheels: a standard inflation gun tip simply doesn't fit the oversized thread on an EM valve. Screwed directly into the large-format valve, it steps the thread down to a size that matches typical inflation guns, so no specialised fittings are needed to air up EM tyres.
What this reducer is for
Valves fitted on earthmover-sized (EM) tyres usually have a wider thread than typical car or tractor valves, which means a standard inflation gun won't connect without an adapter. This reducer screws into that valve and provides a thread of roughly 8 mm, matching commonly used gun tips. A rubber seal keeps the connection airtight while inflating, cutting down on air loss.
Design and construction
Fits standard inflation gun tips.
Keeps the connection airtight while inflating.
Fast fitting, no sticking or cross-threading.
Secure grip, even with protective gloves.
Technical data
| Parameter | Value |
|---|---|
| Product code | 17-589 |
| Name | Internal reducer for EM valves |
| Thread diameter | approx. 8 mm |
| Seal | Rubber, included |
| Fitting method | Screws into a large-format valve |
| Application | Large-format (EM) wheels |
| Sold as | 1 piece |
Applications
- Inflating large-format EM wheels with a standard service inflation gun
- Tyre shops servicing construction and mining equipment
- Field work, where specialised fittings for large valves aren't always on hand
- Quickly switching inflation equipment between standard and large-format wheels
- Fitting and removal that also works comfortably with protective gloves
Frequently asked questions
Which valves does this reducer fit?
Large-format (EM) valves used on construction and mining equipment wheels, which have a wider thread than typical car or tractor valves.
What inflation gun can I use once the reducer is fitted?
The reducer provides a thread of roughly 8 mm, matching common, widely used inflation gun tips, so no specialised fitting for large valves is needed.
Does the reducer include a seal?
Yes, it comes with a rubber seal that keeps the connection airtight while inflating.
Do I need special tools to fit it?
No — the precise thread finish and profiled edges let you screw the reducer in by hand, without extra tools, even while wearing protective gloves.