Freehub body information (non-DT Swiss)

FREEHUB BODY RUNNING CHANGE

Bontrager rear hubs use an unique freehub body that in some cases has encountered removal issues. In these cases, a high amount of torque is necessary to remove or install the freehub body attachment bolt.

To resolve this problem a running change was made to the 2001 product line. The older, direct contact style of freehub body has been replaced with a splined freehub body attachment. This splined attachment requires less bolt torque. Since it is a running change, the following information is necessary to identify which freehub body is on a wheel.

If there is a date code stamped on the freehub body it probably uses a splined attachment. If there is no date, it is a threaded attachment. After May 2000, both styles of freehub bodies (both attachment types) will have this date mark.

These different styles of freehub bodies are not inter- changeable.

Identification of freehub bodies

INSTALLATION AND REMOVAL

If the freehub body is worn or damaged, replace it.

Removing the freehub body

1.Follow the Disassembly instructions for the hub. Remove the axle, and then the right side bearings.

2.Determine the correct size of allen wrench to engage the freehub body attachment bolt.

3.Unthread the bolt in a counter-clockwise direction

(standard threading).

Fig. 4

Installing the freehub body

1.

Carefully clean the mating surfaces and threads of

the freehub body, hub shell, and attachment bolt.

2.

Lubricate the threads of the attachment bolt with

Wrench Force™ synthetic grease, or a similar product.

3.

Carefully engage the threads of the freehub body

attachment bolt into the hub shell. The bolt is steel, and

CNC line

Fig. 1

Threaded freehub body

With the older, threaded freehub body, there are two identifiers. First, there is a CNC machine line approximately 10mm from the outside end of the freehub body (Fig. 1).

Second, the thread-attached freehub body is designed to be removed with a 12mm allen wrench.

the hub is aluminum, so cross-threading the bolt will

result in destruction of the hub shell.

4. With the new splined freehub engagement, make

sure the splines are aligned as you tighten the attachment

bolt.

For the older, threaded style freehub body, tighten the freehub attachment bolt to 350 lb•in (40Nm).

For the newer, splined design, tighten the freehub attachment bolt to 400 lb•in (45.2 Nm).

 

Splined freehub body

 

The newer, splined attach-

 

ment (Fig. 2) freehub body has

 

no CNC line. Further, it is

 

designed to use an 11mm allen

 

wrench for removal. A special

 

adapter (TCG #211338) is made

 

which attaches to an 8mm allen

 

wrench to fit the 11mm allen

 

head of the freehub attachment

Fig. 2

bolt (Fig. 3).

 

In addition, as a running

 

 

change the new hub bodies will

 

include a 6-digit part number

 

embossed on the outside of the

 

hub shell where it is plainly vis-

 

ible. All hubs with the part num-

 

ber visible use the splined free-

 

hub body.

 

 

Fig. 3

 

 

 

Description

TCG Part #

Freehub tool,

211338

11mm adapter

 

 

 

2003 Bontrager Service Manual

11

 

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Bontrager 231793 service manual Freehub body information non-DT Swiss
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231793 specifications

The Bontrager 231793 is an advanced mountain bike tire designed to enhance performance on various terrains while providing users with durability and traction. Known for its dependable construction and innovative features, the 231793 has become a popular choice among cycling enthusiasts seeking a reliable tire for their off-road adventures.

One of the key features of the Bontrager 231793 is its versatile tread pattern. The tire boasts an aggressive design that enhances grip on loose and uneven surfaces such as mud, gravel, and dirt. This tread pattern is carefully engineered to allow for quick, confident cornering while minimizing the risk of slip, making it an ideal choice for adventurous riders who tackle challenging trails.

The tire employs a robust casing that not only contributes to its durability but also enhances puncture resistance. This characteristic is essential for mountain biking enthusiasts who venture into rough terrains where sharp objects may pose a threat to tire integrity. The reinforced sidewalls provide added protection against pinch flats, ensuring a smoother, worry-free ride over rocky and harsh surfaces.

Additionally, the Bontrager 231793 is compatible with tubeless setups, which offers substantial benefits in terms of performance. The tubeless design allows for lower tire pressures, improving traction and overall ride quality while reducing the risk of pinch flats. Cyclists can also enjoy a significant reduction in weight by eliminating the need for inner tubes, resulting in a more responsive handling experience.

Another notable characteristic of the 231793 tire is its weather resistance. Designed to perform reliably in various weather conditions, this tire offers excellent traction on wet surfaces without sacrificing performance in dry conditions. This versatility makes it a suitable option for riders who frequently encounter changes in weather and terrain.

In summary, the Bontrager 231793 stands out in the crowded market of mountain bike tires due to its aggressive tread pattern, durability, and tubeless compatibility. Whether tackling steep climbs, navigating technical descents, or exploring diverse trails, this tire is engineered to provide riders with the confidence and control they need for an exhilarating biking experience. Adventure seekers looking for reliability and performance in their mountain biking adventures will find the Bontrager 231793 to be an exceptional choice.
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