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Extralite

Extralite UltraBottom 51-52

Name: Extralite UltraBottom 51-52
Brand: Extralite
SKU: 77
Price: 48.36 EUR
Availability: OutOfStock
Rating: 5 (1 reviews)

Reference:

€48.36

Extralite UltraBottom 51-52 integrated lower half headset for 1.1/8"-1.1/2" tapered forks. With high quality angular contact bidirectional stainless bearing. Only 25.3 gr weight. Compatibie with 51/52 mm lower head tube bore frames. Made in Italy.

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Extralite UltraBottom 51-52 are a member of UltraTopBottom headsets big family, developed by Extralite to fit almost every different headset standard on the market.

extralite ultrabottom 51-52

All these different standards makes confusion and isn't so easy to know which standard is correct for yur bike, so the best way to go is to measure frame headtube bore with the help of a precision caliper :

extralite ultrabottom 51-52

With the correct measure and the help of the follow chart, you should be able to choose the correct headset for your bike. You can also find an high-resolution version of this chart inside product pictures.

extralite ultrabottom 51-52

Extralite UltraBottom 51-52 is the lower part of an integrated headset that will fit frames with integrated tapered (1.1/8"-1.1/2") headset. Lower headtube bore must have 51 or 52 mm inner diameter. Correct fitting is allowed by the tapered head of the headset bearing.

Headset Equipment :

An high quality bidirectional stainless steel bearing with double seals
A superlight Al 7075T6 CNC lower cone, easy to install and remove without tools
A taperhead bottom spacer

The weight in only 25.3 gr. (27 gr. optional spacer included) so a great value for a product that it's also better in quality than stock cheap headsets.

extralite ultrabottom 51-52

Stainless steel avoid corrosion, and the high quality bearing will assure a precise and smooth action and also a longer life.

Extralite Headsets has a minor stack height than standard ones especially for the upper part of the headset. This is an advantage because :

You can get a lower handlebar riding height with the same steering/control parts, and this is important especially with 29" bicycles.
You can use a fork that has a short cutted headtube.
You can use a fork with a longer travel without modify handlebar riding height (of course steering angle will change a little)

We remember you that's also possible to use standard 1.1/8" forks on frames with tapered headset, with the help of the special Extralite Extrabolt 16 adapter :

extralite ultrabottom 51-52

With this adapter headset bearing will work directly on and headset tapered lower cone will not be installed.

Extralite UltraBottom 51-52 is an high quality product Made in Italy

extralite

Product Details

Reference

Data sheet

Weight :: 25.3 gr.
Headset Style :: Integrated Bottom
Head Tube Bore :: 51 - 52 mm
Tolerance :: 51.00 - 52.50 mm
Fork Standard :: Tapered 1.1/8" - 1.1/2"
SHIS :: IS51/40 o IS52/40
Stack Height :: 1 mm
Bearing Type :: Bidirectional cartridge
Bearing Material :: Stainless Steel
Use :: MTB, Road
Fitting :: Specialized Stumjumper HT Carbon, Epic Carbon, etc.
Range of use :: Unlimited
Max rider weight :: Unlimited

Download

Ultrabottom 51-52 User Manual

Download (80.35KB)

Quick Compare

Product	Extralite UltraBottom 51-52	Extralite UltraBottom 55	Extralite UltraBottom 56	Extralite UltraBottom 44T
Availability	This product is no longer in stock	Available	This product is no longer in stock	Available
Price	€59.00	€59.00	€59.00	€59.00
Description	Extralite UltraBottom 51-52 integrated lower half headset for 1.1/8"-1.1/2" tapered forks. With high quality angular contact bidirectional stainless bearing. Only 25.3 gr weight. Compatibie with 51/52 mm lower head tube bore frames. Made in Italy.	Extralite UltraBottom 55 semi-integrated press fit type lower half headset for 1.1/8"-1.1/2" tapered forks. With high quality angular contact bidirectional stainless steel bearing. Only 31.6 gr weight. Compatibie with 55 mm lower head tube bore frames. Made in Italy.	Extralite UltraBottom 56 semi-integrated press fit type lower half headset for 1.1/8"-1.1/2" tapered forks. With high quality angular contact bidirectional stainless steel bearing. Only 32.3 gr weight. Compatibie with 56 mm lower head tube bore frames. Made in Italy.	Extralite UltraBottom 44T press fit external cup type lower half headset allows to use 1.1/8"-1.1/2" tapered forks also on non tapered native frames provided that 44 mm lower head tube bore. Stack height 10 mm only. Comes with high quality angular contact bidirectional stainless steel bearing. Only 38.3 gr weight. Made in Italy.
Weight :	25.3 gr.	31.6 gr.	32.3 gr.	38.3 gr.
Headset Style :	Integrated Bottom	Press Fit Internal Cup	Press Fit Internal Cup	Press Fit External Cup
Head Tube Bore :	51 - 52 mm	55 mm	56 mm	44 mm
Tolerance :	51.00 - 52.50 mm	54.90 - 55.00 mm	55.90 - 56.00 mm	43.95 - 44.00 mm
Fork Standard :	Tapered 1.1/8" - 1.1/2"	Tapered 1.1/8" - 1.1/2"	Tapered 1.1/8" - 1.1/2"	Tapered 1.1/8" - 1.1/2"
SHIS :	IS51/40 o IS52/40	ZS55/40	ZS56/40	EC44/40
Stack Height :	1 mm	2 mm	2 mm	10 mm
Bearing Type :	Bidirectional cartridge	Bidirectional cartridge	Bidirectional cartridge	Bidirectional cartridge
Bearing Material :	Stainless Steel	Stainless Steel	Stainless Steel	Stainless Steel
Finish :		Black anodized
Use :	MTB, Road	MTB, Road
Fitting :	Specialized Stumjumper HT Carbon, Epic Carbon, etc.	Scott Scale, Spark, etc.
Range of use :	Unlimited	Unlimited	Unlimited	Unlimited
Max rider weight :	Unlimited	Unlimited	Unlimited	Unlimited

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Extralite UltraBottom 51-52

Extralite UltraBottom 51-52 integrated lower half headset for 1.1/8"-1.1/2" tapered forks. With high quality angular contact bidirectional stainless bearing. Only 25.3 gr weight. Compatibie with 51/52 mm lower head tube bore frames. Made in Italy.

Product Details

Data sheet

Download

Quick Compare

Product

Availability

Price

Description

Extralite UltraBottom 51-52 integrated lower half headset for 1.1/8"-1.1/2" tapered forks. With high quality angular contact bidirectional stainless bearing. Only 25.3 gr weight. Compatibie with 51/52 mm lower head tube bore frames. Made in Italy.

Extralite UltraBottom 55 semi-integrated press fit type lower half headset for 1.1/8"-1.1/2" tapered forks. With high quality angular contact bidirectional stainless steel bearing. Only 31.6 gr weight. Compatibie with 55 mm lower head tube bore frames. Made in Italy.

Extralite UltraBottom 56 semi-integrated press fit type lower half headset for 1.1/8"-1.1/2" tapered forks. With high quality angular contact bidirectional stainless steel bearing. Only 32.3 gr weight. Compatibie with 56 mm lower head tube bore frames. Made in Italy.

Weight :

Headset Style :

Head Tube Bore :

Tolerance :

Fork Standard :

SHIS :

Stack Height :

Bearing Type :

Bearing Material :

Finish :

Use :

Fitting :

Range of use :

Max rider weight :

In the same category

Extralite UltraBottom 56 semi-integrated press fit type lower half headset for 1.1/8"-1.1/2" tapered forks. With high quality angular contact bidirectional stainless steel bearing. Only 32.3 gr weight. Compatibie with 56 mm lower head tube bore frames. Made in Italy.

Extralite UltraTop 41-42 HD integrated upper headset for 1.1/8"-1.1/2" standard or tapered forks. With high quality angular contact bidirectional stainless steel heavy duty bearing. Only 22.0 gr weight. Compatibie with 41 mm up to 42 mm inner diameter upper head tube bore frames. Made in Italy.

Extralite UltraBottom 55 semi-integrated press fit type lower half headset for 1.1/8"-1.1/2" tapered forks. With high quality angular contact bidirectional stainless steel bearing. Only 31.6 gr weight. Compatibie with 55 mm lower head tube bore frames. Made in Italy.

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