Brompton G Line Seat Sleeve Reaming Adapter Kit

Brompton G Line Seat Sleeve Reaming Adapter Kit

This is a seat sleeve reaming adapter kit for the G line and G line electric. The G Line adapter kit is installed to the top of the reamer tool extending its length.  

This is a kit that contains the following parts:

• A telescopic seat sleeve insert - to be used as a guide 
• G line adapter kit 

Note this kits does not included the following: 

• Seat sleeve 
• Adhesive 
• Reamer 

The G Line adapter kit extends the length of the reamer for the G line

The seat sleeve is replaced in the same way as the C and P line and uses the same seat sleeve 

Removal

1. Remove the saddle and seat post 
2. Remove the drive side cranks 
3. Remove the seat sleeve by inverting an old seat post using the flared end to hammer out the seat sleeve 
4. Make sure the entire seat sleeve is removed and clean with an aerosol degreaser 
5. Check and re-shape the seat sleeve area if there has been any over tightening 
6. Ensure the tabs are 17mm in width 

Installation

1. Grease the outside of the seat area to prevent any glue contamination 
2. Apply Loctite 480 or equivalent to the seat post insert, only apply to the raised areas
3. Insert making sure the keys are aligned - you will hear a firm click when the seat sleeve is inserted correctly 
4. Make sure the clip is beyond flush with he frame 
5. Use a flat sided tool to make sure the seat sleeve is aligned with the frame 
6. Using a mandrel tool allow the glue to dry while the seat clamp is shut - the minimum time required is 30 minutes 
7. Remove the seat clamp and mandrel tool 
8. Invert the bike 
9. Insert the reaming tool with the adapter kit fitted and telescopic seat sleeve insert is fitted
10. Remove reamer by turning clockwise
11. Clean off the swarf
12. Re-install the seat clamp, the seat post and saddle 

Brompton 2021 Q part code: Q103975 

Note - this is a job that we would recommend having completed at a workshop!