Manual – Tammar v4.8

Serial Numbers
Service History
STEP 1: Rim Tape
STEP 2: Tyres
STEP 3: Cassette & Gears
STEP 4: Brakes Install
STEP 5: Quick Release & Axles
Rider Weight Limits
Final checklist before you ride
Maintenance & Servicing
Impact Damage
Keeping Things Straight
Spoke Tensions
Service Schedule
Service Log Book



G’DAY from Aus!

Congratulations on the purchase of your new Bouwmeester Composites wheelset. Please read carefully through this owner’s manual as it contains important information relating to installation, maintenance and warranty; which are all important to the welfare of you and your wheels.

As you may have already learnt while unpacking your wheels, they have been made to a high tolerance here in Australia. Your first 3month/30hour and other servicing is however important to the lifespan of you wheels. These details are covered later in this manual.

BC believes you have purchased the best wheels on the market – giving you an unmatched performance advantage over your competitors. The innovative design and progressive technology in our wheels will provide that extra edge needed to reach your next goal.

This manual covers the following models.

Tammar v4.8 27.5”/650b, disc only rim
Intended use: Enduro & Trail



For identification, security and quality assurance a serial number is laminated into the wall of your carbon rim. The serial number can be used when contacting Bouwmeester to increase the quality of service we offer.

The serial number references our production database which contains all the information of specifications and quality control. This is a complex system of quality assurance containing everything from customer details and service history, all the way to production specifications of carbon, building process and signoffs by staff. Bouwmeester wheels even record spoke tension when the final build is completed; no one knows our wheels as well as Bouwmeester.

To activate your warranty and register your wheels, go to –

If you have any questions about your wheels please do not hesitate to ask us.




Bouwmeester Composites Tammar rim has a 3 year /or 650hr limited warranty.

You must register your wheels at;

During your purchase you may have been made aware of our warranty policy. The below details are only a summary, if you wish to review the warranty policy in full please visit our website.

Bouwmeester warrants the original purchaser with proof of purchase that the Bouwmeester wheels they have purchased are free from defect in materials and workmanship at the date of purchase. From the date of purchase the warranty period is 3 years /or 650hr of normal use, which ever parameter occurs first.

Warranty does not include general wear and tear, abuse or neglect.

The customer’s obligation under this warranty is to meet four key Bouwmeester service checks outlined in the warranty policy and owners manual.

Four Key Services – Full details at the end of this page

3 month /or 30hr
1 year /or 100hr
2 year /or 300hr
3 year /or 500hr

Bouwmeester’s obligation under our warranty policy is to repair or replace the product if it is deemed defective by us. We do not warranty products that have been sold by an unauthorized dealer, representative or entity. Warranty is voided if repairs or regular maintenance are not carried out by Bouwmeester or an authorised representative.



Please make sure you keep this manual, we have included a section at the back to help you keep track of your service history. It lets you know your next service is due and the authorised mechanic can record the service history once completed.

If we perform the service we will also record the relevant information on our database so your wheels will have a full service history attached to their serial number.



Rim tape on Bouwmeester rims is critical to preventing air and sealant leakage in your tubeless tyre, and if you are running tubes it prevents the spoke from puncturing the tube.

IMPORTANT: Why use our Bouwmeester tape?!

– Bouwmeester tape is exactly the correct thickness to assist in the safe mounting, securing and sealing for the Bead Seat Diameter (BSD) of your tyre.
– Has the correct strength properties not to distort under load and pressure
– Is not effected by sealant chemical
– Is the correct width
– Will not leave sticky residue on your rim when removed

The correct rim tape width is important as too wide will interfere with the tyre bead and too thin will not cover the tyre bead area correctly. We have supplied suitable rim tape fitted with your Bouwmeester wheels.

Rim Tape Width – Rim tape width of 33mm for your Tammar v4.8 rims is recommended

Rim Tape Overlap – New rim tape should be wrapped around the rim with the joining ends having a 15cm overlap cut to length. We recommend this overlap to be centred over the valve hole.

Nipple Hole Plugs – On our rims we use plugs under the tape to fill the cavity left behind the nipple head. Plugs support the rim tape correctly, this helps correct sealing of the tyre for inflation. If no plugs are used the tape will depress under pressure, resulting in difficulties when inflating the tyre.


Tips For Tape Application
– The key to smooth crease free tape is keeping the tape tensioned when applying.
– Use something formable, like a folded rag, to press the tape into shape as you apply the tape under tension. Pressing firmly in the centre channel.
– Be sure to place all the nipple hole plugs in place. If you have lost some contact us for replacements.

TIP: A small dab of grease on the nipple head will hold the plug in place for tape installation.

– After the tape has been applied a hair dryer/heat gun can be used to assist in softening the tape and making it easier to form and adhere 100%. Do not exceed 150degC surface temperature. Once softened you can use the pre-formed sock to apply even pressure and help the tape bond.

– Be sure to place the rim tape centrally around the whole rim .

– When applying new rim tape be sure that it is well adhered to the rim as you don’t want it moving while installing the tyre and tube.

Damaged or Creased Rim Tape – When swapping tyres and tubes be sure to check the rim tape has remained in a central position and is not creased or torn. If it is damaged in any way apply a new rim tape.




Tyre Specs
Tubed, UST and tubeless ready tyres
Tyre size 650b/27.5” 2.1”-2.8” Width

Installation max pressure – 60psi
It is recommended that you should not exceed a tyre pressure of 60psi /or 4.14bar when installing tyres. Exceeding this pressure is outside the parameters that the rims are designed for. If the tyre manufacturer’s maximum tyre pressure is below our specified please adhere to their specifications. Important: 60psi is the max pressure during installation, for recommended operating pressures see below.

The tyre beading – the POP – 30-37psi

When inflating the tyre the tyre bead will sit in the rim well initially. As pressure increases it will ‘POP’ up on to the correct place on the rim, called the rim bead platform. This should occur at about 30-37psi. Some tyres may POP above this pressure, if they do it is ok, but do not exceed the noted max installation pressure of 60psi. If they do not POP by 60psi the bead may be too tight for the rim, or outside manufacturing tolerances.

Operating pressure – 22 – 35psi

Too low a pressure and your tyre will lose its form, too hard and you will compromise grip. We find most riders have a sweet spot with pressure around 26-29psi, and typically 2-4psi lower in the front. Exceeding 35psi is not recommended as the tyre will lose its grip and ability to track.

Tyre Width – Be sure to install a 27.5” tyre diameter that is suitable to the width of your rims, Bouwmeester recommends that our racing rims should have;

Min – 2.1”
Max – 2.8”

Tyre Removal
If using the correct technique tyres should be able to be installed and removed without tyre levers. However some brands of tyres are tighter to install and remove so you may need to use levers.

TIP: Always install tyres finishing at the valve hole. Always remove tyres starting at the valve hole.

Correct Side of Rim to Install Tyres – Please note there is an easier side of the rim to install the tyre, noted on the Bouwmeester rim decal. This is because the rims are offset, the rim well is closer to one rim wall makes it easier to install tyres (See page 13 for diagram).


Old and New Tyres – Bouwmeester recommends only to install new tyres to our wheels. Heavily used tyres may have stretched in the circumference of the bead. Also if a tyre has been installed on a different rim that is oversized this can heavily stretch the tyre. This can cause a loose seal and fit on the rim and could cause tyre failure.

Tyre levers – When using tyre levers be sure not to cause excessive pressure on the rim walls by levering the tyre on too aggressively, this could cause damage. If you are having trouble removing your tyres or would like some tips please contact Bouwmeester.

Sealant – We recommend using only Stans sealant. It is free from ammonia and other nasty chemicals that may cause damage to the rim, spokes and nipple.

Soapy Water – Mild soapy water will assist in installing the tyre by making it slippery for beading up.


Tyre Installation
When inflating the tyre the tyre bead will sit in the rim well initially. As pressure increases it will ‘POP’ up on to the correct place on the rim, called the rim bead platform. This should occur at about 30-37psi.

If the tyre ‘POPs’ below this pressure it may indicate the tyres bead circumference is oversized, or if using a used tyre it is stretched. We recommend that you use another tyre in this situation as the loose fitting tyre will fail to seal and locate on the rim correctly. This may cause tyre failure during use.


Tyre installation quick check
1/ Be sure you are following our guides to tyre size and pressures in this manual.
2/ Make sure you have installed the rim tape and nipple plugs correctly.
3/ Use a mild soapy water to assist tyre installation.
4/ Be sure you are installing from the correct side of the rim, this makes it easier to install.

5/ Prior to installing the second tyre bead install your sealant. We recommend Stans sealant.

6/ When folding the tyre onto the rim always finish at the valve.
7/ When putting the tyre in the rim, be sure to make sure the tyre bead sits in the well channel. This makes putting the tyre on the rim easier.

8/ Once tyre is on, spray or wipe on some soapy water to the tyre near the rim area. This will help bead up the tyre.
9/ When inflating, the tyre should POP up onto the bead of the rim at about 30-37psi. If it is outside this range please read the notes above on pressures and inflation.




Bouwmeester wheels come standard with DT Swiss 240 hubsets; these are available in both Shimano and XD driver freehub body.

The freehub body is interchangeable between the two types, so a switch is possible if you change your groupset. DT also make a range of interchangeable end caps, so if you change bikes there is likely to be an adapter.

Please be sure while installing to align the cogs as per the manufacturers specifications.

Lockring Torque Rating
Please fasten the cassette lockring as per the manufacturers torque specifications.

Adjusting Gears
After installing your cassette and fitting the wheel to your bike we recommend you check the gears. DT hubs are produced to the international standard but there may be small spacing differences with your current wheels, your gears may need adjustment.

To adjust your gears please follow the manufacturers recommendations or consult a professional mechanic.

Be sure when removing the cassette with a chain whip always place the chain on the smallest cog. Failure to do this may result in damage to the aluminium spline.



Disc Brake Adjustment – Your brake pads should always be aligned and central to rotor and should always spin freely. As all hubs are manufactured to slightly difference dimensions you may need to adjust you disc brake pads so they are central to the rotor.

Please review your brake manufacturer’s manual for adjustment instructions. If you are not comfortable with this procedure please consult a professional mechanic.



Your bike may be fitted with quick release or bolt up axles, failure to fasten correctly could result in injury to yourself or damage to the wheelset and bike.

Please carefully read the instructions from the manufacturer and follow their procedure for installation.

PLEASE NOTE: If you are not comfortable with this procedure please consult a professional mechanic.



As with all things, our wheelsets have their structural limits and have been rated up to 100kg rider weight.



1/ Have you read this manual!? 2/ Is your rim tape correctly installed?
3/ Have you inflated the tyres to the recommended pressures?
4/ Have you aligned the cassette as per the manufacturers specifications and tightened the lockring to the correct Nm of torque?
5/ Have you adjusted your gears to suit the new freehub body spacing?
6/ Are your wheels securely fastened in your frame and forks?
7/ Are your new brake pads correctly positioned on the disc rotor?


Then it’s time to ride!



General Cleaning
To clean your wheels use only a bike safe cleaning product. Harsh cleaning chemicals are not recommended at any time as may affect the carbon or contaminate your disc pads.

Never use a high pressure washer as this may displace bearing grease in the hubs.

With correct maintenance and cleaning your Bouwmeester wheels will have an extended life expectancy.

DT hubs are used for their quality, high performance and durability. These bearings are service free and are sealed units.
If ever required replacement bearings can be fitted to your DT 240 hubs.

Your DT 240 freehub body will require servicing. Please follow DT’s recommendations for servicing.

Chris King and other hubs
Please follow the manufacturers instructions for servicing and maintenance.



It is important that after any noticeable or significant impact to your carbon rims while riding you get them professionally inspected. Early inspection can ascertain the extent of damage and if they are safe to continue to ride. If in any doubt contact Bouwmeester and we will be able to give further advice.



Truing wheels – Your wheels have been hand built in Australia to the highest tolerances in the industry. They have been pre stressed, tensioned and trued, then stress relieved and re-trued to offer the ultimate build for durability.

The spokes have been tensioned to a specific rating and every spoke tension is individually recorded on our database. When we service your wheels we can individually assess which spokes have been stressed as we have the information referenced on our database.

For this reason truing and re-tensioned should only be performed by Bouwmeester or an authorised dealer/mechanic.



MAX Limit – There is no spoke limit tension on our Tammar rims. To maintain the same performance we recommend the following tension guides.

Non-drive side – 115-120kg/f
Drive side – 70-80kg/f

Non-drive side – 70-80kg/f
Drive side – 115-120kg/f

Importance of Servicing
To properly care for your wheels regular servicing is recommended and will maintain your wheels warranty policy. It gives the opportunity to check spoke tension, trueness and general condition of your wheels to ascertain if any maintenance is required.

If you notice anything unusual about your wheels or their performance please contact Bouwmeester or consult you local mechanic/dealer.




3 month /or 30hr – Check tension of spokes and adjust if needed to specification and true wheel to tolerances. Check general condition of wheel including spokes, rim and hub function.

1 year /or 100hr – Re-tension spokes to specification and true wheel to tolerances. Check general condition of wheel including spokes, rim and hub function. Remove rim sealant tape, clean under tape and remove any debris or sealant if leaked. Apply new tape and plugs. Service hubs including service and re-lubricate ratchet mechanism.

2 year /or 300hr – As above service.
3 year /or 500hr – As above service.

When getting your wheels serviced please contact us and we will provide the service tech sheet for the mechanic to follow. This information is also available on our support website.




3 month /or 30hr
– Tension and true if required
– Check general condition of wheel
– Check hub function


1 year /or 100hr
– Re-tension spokes to specification
– Check general condition of wheel
– Apply new tape and plugs if required
– Service hubs including freehub body

2 year /or 300hr

– Re-tension spokes to specification
– Check general condition of wheel
– Apply new tape and plugs
– Service hubs including freehub body

3 year /or 500hr

– Re-tension spokes to specification
– Check general condition of wheel
– Apply new tape and plugs if required
– Service hubs including freehub body



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