UltraTop + UltraBottom
from 33.4g.

Hidden weightsavers.

 

Weight: see table.

Sealing: 4 RS + 1 O-Ring.

Stack Height: see table.

Special: HyperCap & UltraStar3 included.

Upper Bearing: Radial micro cartridge or Stainless bidirectional cartridge.

Standard: 1-1/8" straight forks and 1-1/8"-1.5" tapered forks (see table).

Lower Bearing: Stainless bidirectional cartridge.

Finish: black anodized.

Graphics: laser etched.

 

This is our new lineup of modular headsets.

Extremely light and easy to configure on virtually any frameset.

Just measure upper + lower headtube bore diameter then find your model on the chart below.

 

Model
Head tube bore
Tolerance
SHIS
Weight
Headset style
Manual
Fork standard
Stack Height
UltraTop 34
34mm
33.90-33.95mm
EC34/28.6 |
15.6g.
Press Fit - External Cup
Straight Fork 1-1/8
8mm
UltraTop 34 HD
34mm
33.90-33.95mm
EC34/28.6 |
29.5g.
Press Fit - External Cup
Manual
Straight Fork 1-1/8
10.5mm
UltraTop 41
41mm
41.10-41.20mm
ZS41/28.6 |
13.5g.
Press Fit - Internal Cup
Manual
Straight Fork 1-1/8 or
Tapered Fork 1-1/8-1.5
5.6mm
UltraTop 42
42mm
41.95-42.05mm
ZS42/28.6 |
13.8g.
Press Fit - Internal Cup
Manual
Straight Fork 1-1/8 or
Tapered Fork 1-1/8-1.5
5.6mm
UltraTop 41-42 HD
41 to 42mm
41.00-42.50mm
IS42/28.6 | or
IS41/28.6 |
22g.
Integrated - Top
Manual
Straight Fork 1-1/8 or
Tapered Fork 1-1/8-1.5
4.2mm*
UltraTop 44
44mm
43.95-44.00mm
ZS44/28.6 |
14.7g.
Press Fit - Internal Cup
Manual
Straight Fork 1-1/8 or
Tapered Fork 1-1/8-1.5
5.8mm
UltraTop 44 HD
44mm
43.95-44.00mm
ZS44/28.6 |
25.4g.
Press Fit - Internal Cup
Manual
Straight Fork 1-1/8 or
Tapered Fork 1-1/8-1.5
5.5mm
       
     
UltraBottom 34
34mm
33.90-33.95mm
| EC34/30
30.3g.
Press Fit - External Cup
Manual
Straight Fork 1-1/8
9.5mm
UltraBottom 41-42
41 to 42mm
41.00-42.50mm
| IS41/30 or
|
IS42/30
19.9g.
Integrated - Bottom
Manual
Straight Fork 1-1/8
1mm
UltraBottom 44
44mm
43.95-44.00mm
| ZS44/30
23.8g.
Press Fit - Internal Cup
Manual
Straight Fork 1-1/8
1.8mm
UltraBottom 44 T
44mm
43.95-44.00mm
| EC44/40
38.3g.
Press Fit - External Cup
Manual
Tapered Fork 1-1/8-1.5
10mm
UltraBottom 51-52
51 to 52mm
51.00-52.50mm
| IS51/40 or
|
IS52/40
25.3g.
Integrated - Bottom
Manual
Tapered Fork 1-1/8-1.5
1mm
UltraBottom 55
55mm
54.90-55.00mm
| ZS55/40
31.6g.
Press Fit - Internal Cup
Manual
Tapered Fork 1-1/8-1.5
2mm
UltraBottom 56
56mm
55.90-56.00mm
| ZS56/40
32.3g.
Press Fit - Internal Cup
Manual
Tapered Fork 1-1/8-1.5
2mm

* Consiering 3mm upper bearing insert - Maximum bearing insert 4.7mm

HD (Heady Duty) Versions features 2 stainless bidirectional bearing cartridges that can handle double crown forks and manage Freeride abuses.
Stainless and fully serviceable.

UltraTop come with HyperCap and UltraStar3 included for a complete and ultimate headset assembly (add 9.8 g.).

Improvements are on every single element of our original Headsets.

Slimmer, lighter and trickier: a real concentrate
of Extralite's high-quality engineering.

 

Reduced vertical dimensions allow more efficient bike layouts, as example you can use a longer
travel fork while keeping your actual bar and BB level.

Japanese MX technology shows how to divide upper bearing (micro-radial)
and lower bearing (stainless, bidirectional) steering functions; an ultra tricky layout
that reduces weight and improves your race trim shrinking headset stack height.

Consistent weight reduction even if out of sight!

 

Warning: UPPER RADIAL MICRO BEARING are suitable for x-c single crown or road forks only.

UPPER RADIAL MICRO BEARING CANNOT HANDLE UPSIDE-DOWN LOADS/SHOCKS/nor twin-triple clamp forks.

If you have a twin-triple clamp fork and/or you are willing to stunt your bike choose upper stack in HD version.

Need to install a straight 1 1/8" fork onto a tapered frame? See ExtraBolt 16


100% made in Italy