December 27, 2007 – Effective immediately, Dahon is issuing a voluntary recall notice to all owners regarding a potential safety issue with seat post bolts affecting some 2007 model year Dahon bicycles. It has been determined that the seat post bolt on some full-size models of Dahon bicycles can break under use and may pose a potential hazard.
Models Included: 2007 model year Dahon Matrix, Jack, Espresso, Cadenza, Tournado and Smooth Hound bicycles featuring bolt-on seat posts labeled “BioLogic PostPump”, with 27.2mm diameter.
Reason for Recall: Steel material for bolt does not meet specified strength requirements and may fail under use.
Background: The issue appears to only affect seat post bolts used on certain batches of bicycles. However, because the seat post manufacturer has not isolated the affected bolts to specific batches, all seat post bolts on all models will be replaced.
Replacement Procedure:
1. All worldwide Dahon distributors will receive replacement seat post bolts and provide them to dealers upon request. Specific details will vary by country.
2. Consumers should contact their original dealer if possible, or another local Dahon dealer for a free replacement bolt. Dealers should contact their local distributor for further information.
3. The bolts may be replaced by consumers or dealers according to the instructions found below.
Please Note: Before replacing the bolt, grease the bolt. Replacement Bolts should be tightened firmly to a maximum of 180 Kgf-cm or 18 N-m. [Normal hand-force with a standard spanner/wrench is in the range of 130~150 kgf-cm or 13~15 N-m.] For further assistance and clarification of this procedure consumers should seek advice from their local retailer, retailers should obtain direction from their local distributor.
If further questions remain, please contact Dahon directly via e-mail to contact@dahon.com
Don’t forget to upgrade the frame warranty on your Dahon bicycle by registering at: http://www.dahon.com/warranty/
Dahon 27.2mm Biologic Seatpost Bolt Replacement Instructions:
1. Remove the seatpost from the frame by unclamping the Quick Release lever.
2. Loosen the rail clamp bolt with a 6mm Allen wrench, taking care to keep all the loose parts safe.
3. Remove the rail clamp bolt (#1).
4. The old rail clamp bolt, made out of boron steel, should be marked with an “YM” or “C”.
5. The new rail clamp bolt is marked with a “T” and is made out of chromoly. Lightly grease the new rail clamp bolt.
6. Assemble the saddle on the seat post’s rail clamp’s #2 & #3. This can be done by inserting one end of the saddle so that you are sliding the rails into place or by snapping them into place.
7. Check to be sure that the saddle rails are fully engaged in the rail clamps.
8. Tighten the rail clamp bolt by hand to adjust the saddle to the correct angle & fore-aft position.
9. Then torque the rail clamp bolt to 80 ~ 130 in lbs. (9.0 ~ 14.7 NM).
WARNING: A minimum insertion (maximum height) line is engraved on the seat post. Please take care to ensure that the recommended length is always maintained at all times.



