UltraTop from 14.7g.
UltraBottom from 19.9g.

Hidden weightsavers

Weight: see table

Stack Height: see table

Sealing: 4 RSeals + O-Rings

Specials: HyperCap & UltraStar4 included

Upper Bearing: Radial micro cartridge or Stainless bidirectional cartridge

Standards: 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

 

Extremely light and easy to configure on virtually any frameset.

 

How to find your model
Precisely
measure exact bore diameter of your upper and lower headtube with a digital caliper.

Then look at the "Head tube Bore" column on the chart below and find the correspondent model.

 

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 feature 2 stainless bidirectional bearing cartridges that can handle double crown forks and manage DH abuses.
Stainless and fully serviceable.

UltraTop come with HyperCap and UltraStar4 included for a complete and ultimate headset assembly (add 7.6g total).


Improvements are on every single element of our original parts.

Reduced stack dimensions allow more efficient bike layouts.

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

Japanese MX design shows since decades how to divide functions between steering loads:
lighter upper bearing (radial only) and a lower bidirectiona bearing.
This tricky layout reduces weight and improves your race trim minimizing headset stack height.

 

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 1 1/2" frame?

See ExtraBolt 16


100% made in Italy