ZTTO Bicycle Headset

Material: CNC machined AL6061 T6
SEALD BEARING

ZTTO code: Upper cup/Bearing outside diameter+ Lower cup/Bearing outside diameter + Fork tube

("44" for OD ø44,"56" for OD ø56,"S"for Straight Tube ,"T" for Tapered Tube fork)

ZTTO code is for quick search,not a accurate specifications.Please refer to SHIS(Standard Headset Information System)

If you have any question about headset standard,Please google "headset standard park tool" or contact us

Caution: Due to product batch,the colors of crown race and bearing will be different. But it won't have any bad influence on its performance.

4252T

"42" for OD ø42, "52" for OD ø52, "T" for Tapered Tube fork

Integrated Angular Contact

IS42/28.6
IS52/40

4252ST

"42" for OD ø42, "52" for OD ø52, "S"for Straight Tube, "T" for Tapered Tube fork

Integrated Angular Contact

IS42/28.6
IS52/40(30)

4444S

"44" for OD ø44, "S"for Straight Tube fork

ZS44/28.6
ZS44/30

4444T

"44" for OD ø44,"T" for Tapered Tube fork

ZS44/28.6
EC44/40

4455ST

"44" for OD ø44, "55" for OD ø55, "S"for Straight Tube, "T" for Tapered Tube fork

ZS44/28.6
ZS55/40(30)

4456ST

"44" for OD ø44, "56" for OD ø56, "S"for Straight Tube, "T" for Tapered Tube fork

ZS44/28.6
ZS56/40(30)

3434S

"34" for OD ø34,"S"for Straight Tube fork

EC34/28.6
EC34/30

4247T

"42" for OD42, "47" for OD47, "T" for Tapered Tube fork

IS42/28.6
IS47/33

Attention: this is for 1-1/4" (1.25 inch )Tapered Tube.

F4444S Folding Bike Headset

"F" for Folding bike, "44" for OD 44mm, "S"for Straight Tube fork

ZS44/28.6
ZS44/30

This headset design for floding bike, so there is NO star nut, screw and cap.