SEIDO Fork Bicycle Bombtrack Instruction Manual

Fork Bicycle Bombtrack

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Specifications

• Brand: Seido Components
• Material: Carbon
• Usage: Bicycle fork

Product Information

General Information

Attention: All Seido components must be assembled by a qualified
bicycle mechanic using appropriate tools. It is crucial to follow
the installation instructions provided. Failure to do so can result
in component failure and accidents.

Mounting Carbon Fork

To mount the carbon fork correctly, follow the provided
instructions and ensure that all connections are tightened to the
specified torque using a calibrated torque wrench.

Mounting the Headset / Cone

Properly mount the headset/cone as shown in the provided images.
Pay attention to the specific instructions for a secure fit.

Shorten Steerer Tube

When shortening the steerer tube, ensure that the length is
appropriate for the upper control bearing and stem. Follow the
guidelines provided to achieve a complete and secure clamp.

Product Usage Instructions

Operating Instructions

Fork

Before each ride, check all components for correct installation,
tight fit, and any defects. Carbon components should undergo a
visual inspection for defects before each use.

Shorten the Shaft

To shorten the shaft, use a saw guide and saw blade suitable for
carbon material. Wrap the cut area with elastic tape to minimize
fraying.

FAQ

Q: Can I assemble the components myself without professional

help?

A: It is recommended that all Seido components be assembled by a
qualified bicycle mechanic to ensure safety and proper
functioning.

Q: How often should I inspect the carbon components?

A: Before each ride, conduct a visual inspection of carbon
components for surface defects or damage.

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Instruction manual fork

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Content
General information………………………………………………………………………………………………………………………2 Mounting carbon fork…………………………………………………………………………………………………………………….3
Mounting the headset / cone ……………………………………………………………………………………………………….3 Shorten steerer tube ………………………………………………………………………………………………………………….4
Shaft ……………………………………………………………………………………………………………………………………4 Shorten the shaft……………………………………………………………………………………………………………………5 Burr …………………………………………………………………………………………………………………………………….5 Mounting the Expander ………………………………………………………………………………………………………………6 Mounting steel fork ……………………………………………………………………………………………………………………….7 Mounting the headset / cone ……………………………………………………………………………………………………….7 Shorten steerer tube ………………………………………………………………………………………………………………….7 Shaft ……………………………………………………………………………………………………………………………………7 Shorten the shaft……………………………………………………………………………………………………………………7 Burr …………………………………………………………………………………………………………………………………….7 Mounting the Ahead Claw……………………………………………………………………………………………………………7 Mounting the brake caliper……………………………………………………………………………………………………………..8 Installation instructions accessories ………………………………………………………………………………………………..8 Weight …………………………………………………………………………………………………………………………………….9 Ongoing maintenance and inspection ………………………………………………………………………………………………9 Scope ………………………………………………………………………………………………………………………………………10 Specifications ……………………………………………………………………………………………………………………………12 RGT Gravel / Allroad Gabel…………………………………………………………………………………………………………12 MGV Gravel / Allroad Gabel ……………………………………………………………………………………………………….13 TAZA Bikepacking MTB Gabel……………………………………………………………………………………………………..14 BPS Bikepacking MTB Gabel ………………………………………………………………………………………………………15

Operating instructions

Fork

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General information
Attention: All Seido components must be assembled by a qualified bicycle mechanic using appropriate tools. All the following installation instructions are aimed at these people.
Screw connections that are marked with a torque in the assembly instructions or on the component itself must always be tightened using a calibrated torque wrench. Screws that are too tight or too loose can lead to component failure and subsequently to a fall with serious injuries or even death.
In order to ensure safe operation, this and, if applicable, other enclosed technical documentation for assembly, commissioning, care and maintenance must be observed.
Seido Components accepts no liability for property damage or personal injury caused by incorrectly assembled components or failure to follow the instructions for commissioning, use, maintenance and care.
Attention: Cycling can be dangerous, before each ride all components must be checked for correct installation, tight fit and freedom from defects and defects (cracks, deformations, wear, corrosion).
Carbon components can suddenly fail during operation due to improper use and external damage. Therefore, they should be subjected to a full visual inspection for surface defects before each ride. Do not put carbon components with cracks, holes or deformations into operation! In this case, it is essential to consult a qualified mechanic to check and, if necessary, replace the component.

Operating instructions

Fork

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Mounting carbon fork
Mounting the headset / cone
According to the S.H.I.S. information, a tax rate suitable for the frame must be selected. Seido recommends mounting a headset with a slotted fork cone (see Image 1), they do not have to be pressed onto the cone seat. When using a closed cone, the note below should be observed. Attention: Before a closed fork cone is pressed, the inner diameter of the cone must always be checked. This must be in the range of 39.7 – 39.8 mm with a nominal cone seat of 40 mm (see Image 2). Buoyancy of a cone below 39.7 mm inner diameter can damage the steerer tube and lead to undetectable material failure. There is a danger to life! A cone with an inner diameter larger than 39.8 mm is too loose and the headset will not be able to be adjusted without play.
Image 1 Forked cone with slot
Image 2 Closed fork cone for crimping

Operating instructions

Fork

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Shorten steerer tube
Caution: Machining carbon produces carcinogenic dust. Wear a respirator. Do not inhale dust. Clean work
surfaces with a moistened rag.
Shaft
The shaft length must be chosen so that 35 mm is not exceeded between the upper edge of the upper control bearing and the lower edge of the stem, see Image 3. Furthermore, the length of the steerer tube must be chosen so that, including the contact height of the expander, at least 5 mm of steerer tube protrudes over the stem in order to achieve a complete and even clamping of the steerer tube (Image 4).
Image 3 Schaftläng

Image 4 Shorten steerer tube
Operating instructions

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Shorten the shaft
To shorten the shaft, use a saw guide and saw blade suitable for carbon (Image 5). To keep fraying to a minimum, wrap the shaft area behind the cut tightly with a little elastic tape (Image 6).

Image 5 Steerer Tube Saw Guide
Image 6 Adhesive tape steerer tube
Burr
Lightly deburr the inside and outside of the shaft with a suitable file, no sharp edges should remain.

Operating instructions

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Mounting the Expander
1. Measure the inner diameter of the steerer tube. 2. Install the expander with a slot opposite the stem clamp (see Image 7). 3. Assemble the expander with a specified torque.

Image 7 Montage Expander

Operating instructions

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Mounting steel fork
Mounting the headset / cone
According to the S.H.I.S. information, a tax rate suitable for the frame must be selected. Seido recommends mounting a headset with a slotted fork cone (see Image 1), they do not have to be pressed onto the cone seat. When using a closed cone, the note below should be observed. Attention: Before a closed fork cone is pressed, the inner diameter of the cone must always be checked. This must be in the range of 39.7 ­ 39.8 mm with a nominal cone seat of 40 mm (see Image 2). Buoying a cone below 39.7mm inner diameter can damage the steerer tube and lead to undetectable material failure. There is a danger to life! A cone with an inner diameter larger than 39.8 mm is too loose and the headset will not be able to be adjusted without backlash.
Shorten steerer tube
Shaft
The shaft length must be chosen so that 35 mm is not exceeded between the upper edge of the upper control bearing and the lower edge of the stem, see Image 3. Furthermore, the length of the steerer tube must be chosen so that, including the contact height of the expander, at least 5 mm of steerer tube protrudes over the stem in order to achieve a complete and even clamping of the steerer tube (Image 4).
Shorten the shaft
To shorten the shaft, use a saw guide and saw blade suitable for steel (Image 5).
Burr
Lightly deburr the inside and outside of the shaft with a suitable file, no sharp edges should remain.
Mounting the Ahead Claw
Hammer in the Ahead claw with a suitable impact guide and a hammer. Caution: When hammering in, the fork must be held in the hand and must not be supported on a solid surface to prevent damage.

Operating instructions

Fork

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Mounting the brake caliper
1. Select the appropriate brake caliper and adapter using the “brake” indication in the specification table (page 12 ff). 2. Check the brake caliper threads of the fork: These should be undamaged and free of any foreign objects. If necessary, blow out with a desire to press. 3. Install the brake caliper and adapter according to the manufacturer’s specifications. Pay attention to the maximum torque of the threads (see page 12 ff). Check the adapter position for the correct position for the selected disc diameter.
Installation instructions accessories
The maximum load capacity of the bottle cage eyelets refers to the dynamic load to which the brackets are subjected. Forks with mounted bottle cages must be handled with great care. If the bike with the bottle cage is placed against a wall or on the ground, or if the bottle cage hits an obstacle, a dynamic load is created that is far above the maximum load. Installed cages must touch the surface of the fork blade within a 5 mm radius around the center of the mounting screw. (Image 8, grey area)

Image 8 Contact surface bottle cage eyelets
Caution: Spacers may need to be used between the cage and the fork tube.
A medium-strength screw lock should always be used with all bottle cages / protective sheets and luggage rack screws to prevent the screws from vibrating loose. Before any longer ride, the luggage rack and mudguards must be checked for a tight fit.

Operating instructions

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Weight
The weights in the specification table refer to the weight per eyelet. The maximum torque of the fastening screws is 5 Nm. Maximum load bottle cage eyelet (1.5 kg per eyelet): A bottle cage with 2 fastening screws can be loaded with up to 3 kg, a cargo cage with three fastening screws with up to 4.5 kg. Maximum load luggage rack (5 kg per eyelet): For lowrider luggage racks with four mounting points, this results in a maximum weight of 20 kg. For front racks with three attachment points, the maximum weight is 10 kg, as the attachment to the fork crown does not transfer a horizontal load.
Ongoing maintenance and inspection
Attention: Each bicycle part has a limited lifespan. Normal wear and tear, shocks or careless use can cause unexpected failure that can lead to serious injury. The fork must be inspected for signs of wear, stress or shockrelated damage before each ride. If cracks, deformations, delamination or discoloration occur, or if creaking noises occur while riding, the fork must be checked carefully immediately. Attention: With the exception of shortening the steerer tube, the fork must not be changed or modified in any way. Changes to the fork can cause the fork or other components to fail and lead to serious injury.

Operating instructions

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Scope
Seido forks are divided into different categories according to their area of application (according to EN 17406). Forks for gravel / all-road / cross bikes are approved for use under category 1 2 and 6, MTB forks for category 1 to 3 and 6. The respective categories are listed in the specification tables on page 14 ff. Category 1 Description: Use on paved surfaces, tires keep contact with the ground at average speed. Purpose: Commuting and leisure rides Intended height of drops/jumps: Up to 15 cm Typical average speed: 15 to 25 km/h
Category 2 Description: Use on unpaved surfaces, with moderate slopes. Intended use: Gravel and Touring Intended height of drops/jumps: Up to 15 cm Typical average speed: 15 to 25 km/h
Category 3 Description: Use on unpaved surfaces, with jumps and drops up to 60 cm. Purpose: XC and Trail MTBs Intended height of drops/jumps: Up to 60 cm
Category 4 Description: Use on unpaved surfaces, with jumps and drops up to 120 cm. Purpose: All Mountain MTBs Intended height of drops/jumps: Up to 120 cm
Category 5 Description: Use on unpaved surfaces, with jumps and drops over 120 cm cm. Purpose: Enduro and Downhill Intended height of drops/jumps: over 120 cm

Operating instructions

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Category 6 Description: Use on paved surfaces at high speeds of more than 50 km/h Purpose: Road Bike / CX / Gravel Race Intended height of drops/jumps: Up to 15 cm Typical average speed: 30 to 55 km/h

Operating instructions

Fork

Specifications
RGT Gravel / Allroad Gabel
MODEL MATERIAL STEER TUBE MINIMUM DISTANCE FORK CROWN TO UPPER HEADSET BEARING S.H.I.S. DIMENSIONEN OFFSET DISTANCE AXLE – FORK CROWN BRAKE

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RGT Fork UD-Carbon Conical, 1-1/8″ – 1-1/2″, 300 mm length
80 mm 28.6 | 40 50 mm 400 mm Flat Mount 160, rotor size 160 – 180 mm

INTERNAL ROUTING

Brake Hose / Dynamo CableTwo options for routing the front brake: fully internal brake line routing (the front brake line is placed through the steerer tube into the fork) or semi-internal brake line routing (the front brake line is placed through the right fork tube). The opening in the steerer tube can also be used for the completely internal routing
of the hub dynamo cable.

MOUNTS
WEIGHT
TIRE CLEARANCE MAXIMUM SYSTEM WEIGHT DIAMETER OF THE FORK CROWN EN 17406 CLASSIFICATION OF USE HUB DIMENSION TA TOTAL LENGTH (CLOSED) TA THREAD DIAMETER X PITCH MIN. THREAD LENGTH MAX. HUB END CAP DIAMETER MAX. TORQUE EXPANDER MAX. TORQUE STEM MAX. DREHMOMENT TA MAX. TORQUE BRAKE BOLTS MAX. DREHMOMENT CARGOCAGE MAX. TORQUE THREAD INSERT TA MAX. LOAD PER BOTTLE CAGE EYELET MAX. LOAD LUGGAGE RACK

Cargocage / Headlights / Fenders
510 g (without thru axle, without screws, uncut steerer)
47 – 622 / 54 – 584 130 kg 57 mm 1 / 2 / 6
12 x 100 mm 120 mm M12 x 1.5 14 mm 21 mm 8 Nm 6 Nm 10 Nm 8 Nm 5 Nm 1.5 kg
No luggage rack release

Operating instructions

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MGV Gravel / Allroad Gabel
MODEL MATERIAL STEER TUBE MINIMUM DISTANCE FORK CROWN TO UPPER HEADSET BEARING S.H.I.S. DIMENSIONEN OFFSET DISTANCE AXLE – FORK CROWN BRAKE

MGV Fork UD-Carbon Conical, 1-1/8″ – 1-1/2″, 300 mm length
100 mm
28.6 | 40 53 mm 410 mm Flat Mount 160, rotor size 160 – 180 mm

INTERNAL ROUTING

Brake Hose / Dynamo CableTwo options for routing the front brake: fully internal brake line routing (the front brake line is placed through the steerer tube into the fork) or semi-internal brake line routing (the front brake line is placed through the right fork tube). The opening in the steerer tube can also be used for the completely internal routing
of the hub dynamo cable.

MOUNTS
WEIGHT
TIRE CLEARANCE MAXIMUM SYSTEM WEIGHT DIAMETER OF THE FORK CROWN EN 17406 CLASSIFICATION OF USE HUB DIMENSION TA TOTAL LENGTH (CLOSED) TA THREAD DIAMETER X PITCH MIN. THREAD LENGTH MAX. HUB END CAP DIAMETER MAX. TORQUE EXPANDER MAX. TORQUE STEM MAX. DREHMOMENT TA MAX. TORQUE BRAKE BOLTS MAX. DREHMOMENT CARGOCAGE MAX. TORQUE THREAD INSERT TA MAX. LOAD PER BOTTLE CAGE EYELET MAX. LOAD LUGGAGE RACK

Cargocage / Headlights / Fenders / Rack
530 g (without thru axle, without screws, uncut steerer)
58 – 622 (29″ x 2.25″) / 64 – 584 (27.5″ x 2.5″) 140 kg 57 mm 1 / 2 / 6
12 x 100 mm 120 mm M12 x 1.5 14 mm 19 mm 8 Nm 6 Nm 10 Nm 8 Nm 5 Nm 2 Nm 1.5 kg
20 kg (5 kg per eyelet)

Operating instructions

Fork

TAZA Bikepacking MTB Gabel
MODEL MATERIAL STEER TUBE MINIMUM DISTANCE FORK CROWN TO UPPER HEADSET BEARING S.H.I.S. DIMENSIONEN OFFSET DISTANCE AXLE – FORK CROWN BRAKE

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Gabel MUG UD-Carbon Conical, 1-1/8″ – 1-1/2″, 300 mm length
100 mm 28.6 | 40 51 mm 510 mm Post mount 7″, max. 220 mm rotor size

INTERNAL ROUTING

Dynamo cable

MOUNTS
WEIGHT
TIRE CLEARANCE MAXIMUM SYSTEM WEIGHT DIAMETER OF THE FORK CROWN EN 17406 CLASSIFICATION OF USE HUB DIMENSION TA TOTAL LENGTH (CLOSED) TA THREAD DIAMETER X PITCH MIN. THREAD LENGTH MAX. HUB END CAP DIAMETER MAX. TORQUE EXPANDER MAX. TORQUE STEM MAX. DREHMOMENT TA MAX. TORQUE BRAKE BOLTS MAX. DREHMOMENT CARGOCAGE MAX. TORQUE THREAD INSERT TA MAX. LOAD PER BOTTLE CAGE EYELET MAX. LOAD LUGGAGE RACK

Cargocage / Headlights / Rack
656 g (without thru axle, without screws, uncut steerer)
75-622 (29″ x 3.0″) / 75-584 (27.5″ x 3.0″) 150 kg 57 mm
1 / 2 / 3 / 6 15 x 110 mm
135 mm M15 x 1.5
14 mm 21 mm 8 Nm 6 Nm 10 Nm 8 Nm 5 Nm 2 Nm 1.5 kg 20 kg (5 kg per eyelet)

Operating instructions

Fork

BPS Bikepacking MTB Gabel
MODEL MATERIAL STEER TUBE MINIMUM DISTANCE FORK CROWN TO UPPER HEADSET BEARING S.H.I.S. DIMENSIONEN OFFSET DISTANCE AXLE – FORK CROWN BRAKE

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BPS Fork Cr-Mo steel Conical, 1-1/8″ – 1-1/2″, 300 mm length
80 mm 28.6 | 40 51 mm 500 mm Post mount 6″, max. 203 mm rotor size

INTERNAL ROUTING

Dynamo cable

MOUNTS
WEIGHT
TIRE CLEARANCE MAXIMUM SYSTEM WEIGHT DIAMETER OF THE FORK CROWN EN 17406 CLASSIFICATION OF USE HUB DIMENSION TA TOTAL LENGTH (CLOSED) TA THREAD DIAMETER X PITCH MIN. THREAD LENGTH MAX. HUB END CAP DIAMETER MAX. TORQUE EXPANDER MAX. TORQUE STEM MAX. DREHMOMENT TA MAX. TORQUE BRAKE BOLTS MAX. DREHMOMENT CARGOCAGE MAX. TORQUE THREAD INSERT TA MAX. LOAD PER BOTTLE CAGE EYELET MAX. LOAD LUGGAGE RACK

Cargocage / Headlights / Fenders / Rack
1694 g (incl. thru axle, 10 screws, untrimmed steerer)
27.5″ x 3.0″ / 29″ x 3.0″ 175 kg 57 mm
1 / 2 / 3 / 6 15 x 110 mm
135 mm M15 x 1.5
14 mm 21 mm
8 Nm 10 Nm 8 Nm 5 Nm
1.5 kg 20 kg (5 kg per eyelet)

Operating instructions

Fork

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