29" ROCKRIDER XC 500 MTB (LIGHT BLUE)

29" ROCKRIDER XC 500 MTB (EAGLE LIGHT BLUE)

Ref 8558253

Designed for regular training sessions and participating in Cross Country MTB races. Measure your performance and push yourself to new heights! You will love this XC MTB with an aluminium frame, high-performance GX drivetrain, REBA fork, and 27.5" wheels. This "SWITCH & RIDE" MTB is compatible with 3 wheel sizes (27.5", 29" and 27.5" PLUS).

First use

PREPARING YOUR MOUNTAIN BIKE
BEDDING IN YOUR BRAKES

The brake pads and discs on a new bike are new themselves and don't work to their full potential.

Hard, continuous braking (on descents, for example) can cause the pads to overheat and "glaze".

To prevent this from happening and to ensure that your brakes slow you down effectively, we recommend that you bed them in.
You need to apply each brake firmly around ten times to bed them in properly. The bedding-in process involves getting up to a speed of 25 km/h and then applying just one of the brakes firmly to reduce your speed to 5 km/h, without locking the wheel.

HOW TO CONVERT YOUR WHEELS TO TUBELESS

You can avoid the risk of the inner tubes on your mountain bike getting punctured or pinched by switching to TUBELESS. To do this you'll need to buy the following: -Sealant: DECATHLON: TUBELESS READY TYRE AND WHEEL SEALANT (8550735)   STEPS TO FOLLOW:
1. Take the wheel off.
2. Remove the tyre and the inner tube from the wheel.
3. Apply the tubeless rim tape.
4. Insert a Schrader TUBELESS valve in the valve hole in the wheel.
5. Apply the sealant.
6. Fit your new TUBELESS tyre.
7. You need to inflate the wheel quickly to ensure that the tyre sticks to the rim. If it seems too tricky, just visit your nearest DECATHLON workshop and ask them to do it for you.

ADJUSTING YOUR FORK

Click on the link below for MANITOU's instructions on how to adjust your fork.

equipements-vtt-st520-rockrider
GETTING THE RIGHT GEAR TO DEAL WITH PROBLEMS

You need to have the right equipment with you when you're out and about on your mountain bike so that you can take care of a puncture, a broken chain or any other type of setback. Here's a selection of products that can get you out of a tight spot or two.

HAVE A PROBLEM?

THE WHEEL IS BUCKLED
and buckling wheels on a ROCKRIDER ST 100 mountain bike

When you take your new bike out for a ride for the first time, a lot of parts move around and fall into place.

You'll hear the spokes on your wheels creak because of the residual torsion in them.

Your bike is fitted with double-walled rims, which help make the wheels more solid. That means they should not buckle in any way at all.
If they do, then call in at one of our DECATHLON workshops to have them repaired free of charge:
1. As part of a free check-up in the first six months following the date of purchase. 2. As part of our €1 damage insurance plan (valid for two years).

YOU'VE GOT A PUNCTURE
Puncture ROCKRIDER ST 100 mountain bike

It's a sad fact of cycling that everyone gets punctures. - The terrain (thorns, bramble bushes, glass, nails, etc)
- and use of the bike (catching tyres on obstaclessuch as stones, steps, kerbs and potholes)
are the most common causes of punctures and pinched tyres respectively.

If you keep suffering punctures, there can be several factors at play:
- The wheel has not been assembled properly in the factory and a spoke keeps piercing the inner tube.
- A substandard tyre or inner tube.
- A badly repaired puncture or a foreign body (thorn, piece of glass, shard of metal, etc) stuck on the rim or in the tyre.

It's important to find out what is causing the puncture and to remove any foreign bodies before repairing it.

I don't know how to put a tyre on or take one off so how am I going to repair or change an inner tube?
1. The simplest thing to do is not to touch your wheel and use a can of puncture repair foam as a temporary solution: Screw the end of the tube on to the valve of the punctured tyre (with the valve pointing down) and press down to inject the foam. The tyre will regain its shape and hardness, allowing you to get home. 2. If you've taken out our 1-euro damage insurance plan, you can have your tyre fixed at one of our DECATHLON workshops. 3. If you want to repair or change the inner tube yourself, then check out the tutorial videos below.  

THE FORK IS TOO HARD

There are one or two things you can do to make your fork "softer": 1. Do some basic maintenance: using a simple oil can. Squirt some oil on the pivots of the fork and move it around to work the oil into the blades.

2. Have the bike fully serviced in a workshop.

THE REAR GEARS ARE NOT SHIFTING PROPERLY

There could be several reasons why your gears (cogs) are not shifting correctly.

1. Check the position of the housing ends.
Housing ends that are out of position can obstruct the derailleur cable when it is being pulled and prevent the rear gears (cogs) from shifting smoothly. If a housing end is out of position, push it back into place.

2. The cable and housings may have jammed up.
If the smallest gears (cogs) do not move down, if the derailleur doesn't move even when the gear shifter is operated, then the cable and the housings have jammed up. They need to be replaced.
3. Take your mountain bike to a DECATHLON workshop to have the derailleur adjusted. 4. Use the SRAM DERAILLEUR ADJUSTER to set your Sram derailleur to the correct position. This valuable tool adjusts the distance between the top pulley and the cassette. 5. You should also check that the derailleur dropout is not twisted.If it is, check the section "THE DERAILLEUR DROPOUT IS BROKEN".   NB: If you regularly use your mountain bike in wet or muddy conditions or if you wash it a lot, then you will need to replace the housings and cables more often. We strongly advise you not to use a pressure hose to wash your mountain bike as it will force dirt into the housings.

YOU START PULLING THE BRAKE LEVER AND IT TOUCHES THE HANDLEBARS
BLEED-BRAKES-ROCKRIDER-MOUNTAIN-BIKE

The lever is spongy and/or touches the handlebars before you can brake:
You need to bleed the brake system.
Drop in at a DECATHLON workshop and get one of our technicians to do it.

THE DERAILLEUR DROPOUT IS BROKEN

A twisted dropout causes the derailleur to become misaligned, preventing it from doing its job correctly. Look at your bike from behind and check to see if the derailleur is straight.

If the dropout is twisted or broken, take your bike to a DECATHLON workshop to have it replaced. Alternatively, watch this video. It will show you how to replace it yourself.

THE CHAIN IS BROKEN

So you've broken your chain.You've got two options: 1. Repair it yourself with the help of this video. You'll need a chain tool and a quick-release link.  2. Drop in at one of our DECATHLON workshops and have it done by one of our technicians.

TUTORIAL VIDEOS

These videos show you how to repair your bike and replace parts yourself. Our YouTube channel has a lot more content. Have a good look around.
Converting to tubeless tyres
  • Converting to tubeless tyres
    Converting to tubeless tyres
  • Avid replacement brake pads
    Avid replacement brake pads
  • Tektro replacement brake pads
    Tektro replacement brake pads
  • Bedding in mountain bike brakes
    Bedding in mountain bike brakes
  • Adjusting suspension on semi-rigid/hardtail mountain bikes
    Adjusting suspension on semi-rigid/hardtail mountain bikes
  • Adjusting suspension on full-suspension mountain bikes
    Adjusting suspension on full-suspension mountain bikes

CARING FOR YOUR MTB

CLEANING YOUR MTB

To clean your bike properly, you'll need some bike cleaner, a sponge, and a brush.

Rinse off the bike with a hose and apply the bike cleaner.

Next, use the sponge and brush to apply the cleaner effectively.

It's essential to give the bike cleaner some time to act before rinsing the bike off.

When hosing the bike off, make sure you do so from a few steps away so as not to damage the mechanical components.

Lastly, dry your bike using a cloth that is dry, clean and soft.

CLEANING AND LUBRICATING YOUR DRIVETRAIN

To clean and lubricate your drivetrain, you'll need a degreasing spray, a suitable brush, and bike lubricant.

The first step is to protect your brake disc with a clean cloth to prevent any grease or lubricant getting on it.

Next, spray the degreasing agent onto the entire drivetrain, scrub the cassette, the chain, and the rollers on the derailleur with the brush.

Let it sit for a few minutes before rinsing with a hose from a moderate distance.

Wait a little while to let the drivetrain dry before moving on to the greasing step.

For greater effectiveness, shake the can of bike lubricant and spray on the inner side of the chain.

REPLACING A DRIVETRAIN CABLE

Is your drivetrain cable dirty, rusty, damaged, or do you find changing speeds to be difficult or unreliable? 

If so, you need to replace your drivetrain cable. To do so you'll need a pair of pliers, a screwdriver, a wirecutter, an Allen key, and a new set of derailleur cables and cable housing.

First, remove the cable from its housing. Start by removing the shifter cover, and placing the indicator on the highest gear; then cut the cable to be able to remove the entire cable, followed by the housing.

Next, measure out how much cable housing you need against your bike, cut it, and put caps on either extremity. Then install it on the bike.

Install the cable on the shifter and pull it through the housing. Once done, put the cover back on the shifter and attach the cable to the derailleur. To adjust the drivetrain, tighten the cable if you have a hard time shifting to higher gears, and loosen it if you have a hard time shifting to lower gears.

Once adjusted, cut the cable and put a cap on the extremity using a pair of pliers.

REMOVING YOUR REAR WHEEL

Removing and installing a wheel if your bike is equipped with a derailleur cage plate lock can be a tricky operation.

First, put the chain on the smallest cog, then unlock the derailleur cage plate.

To remove the wheel, simply open the quick release without changing its adjustment.

To put the wheel back on, insert the wheel, place the chain on the smallest cog, tighten the quick release, and lock the derailleur cage plate to keep the chain from jumping!

REPAIRING A FLAT TYRE

To repair a flat tyre, you will need: a bicycle pump, a basin with water, a dry cloth, and an inner tube repair kit.

Partially inflate the inner tube. Submerge the inner tube into the water to locate the puncture by the source of the bubbles.

Once you have located the puncture hole, dry off the inner tube with the cloth and rub the spot to be repaired using the sandpaper included in the inner tube repair kit.

This prepares the inner tube for glueing and ensures that the patch sticks to the inner tube as securely as possible.

Generously apply glue to the inner tube around the hole and wait 3 to 5 minutes.

Then apply the patch to the hole and hold it in place for a few minutes.

You can now install the repaired inner tube into your tyre and onto your bike! 

 

REPLACING THE BRAKE PADS ON MECHANICAL DISC BRAKES

To do this, you will need: brake pads, a flat head screwdriver, and a 3 mm Allen key.

First, remove the wheel. Next, use a large flat head screwdriver to separate and remove the pads, and put the pistons back into their original position.

Next, remove the pin that holds the pads, and remove the pads from their casing. Prepare the new brake pads by placing the return spring between them.

Insert the new brake pads into the brake caliper, and finish by installing the brake pin.

Put the wheel back on and do a visual inspection to check that the brake pads are in their proper place and do not rub against the disc.

ADJUSTING THE MECHANICAL DISC CALLIPER

For this operation you will need a 5 mm Allen key.

Unscrew the brake caliper, spin the wheel, and squeeze the brake lever. It's important to keep the brake lever squeezed before tightening the caliper. 

Lastly, perform a visual inspection to check that the disc and the pads are still in contact while braking.

REPLACING YOUR DERAILLEUR HANGER

To do this operation you will need a new derailleur hanger that fits your bike (see the section on "SPARE PARTS"), and a 5 mm Allen key.

Remove the bike wheel as well as the damaged derailleur hanger using the Allen key.

Position the new hanger on the frame. 

Remove the old hanger from the derailleur before installing the new hanger using the 5 mm Allen key.

Then install the derailleur onto the new hanger and check that you can change gears properly.

REPLACING THE CHAIN

To do this, you will need: a chain tool, a new chain, and a quick-link.

Place the chain on the largest cog and the smallest chainring. 

First, remove the existing quick-link using the quick-link tool, then remove the chain from the bike.

Place the new chain on the largest cog and the smallest chainring in order to more easily define the optimal chain length.

Pull the chain down, pass it under the upper pulley of the derailleur.

Once you've defined the correct length, use the chain tool to cut the chain.

Lastly, install the quick-link onto the chain, turn the pedal so as to position the quick-link on the upper part of the chain, and use your hand to apply pressure and ensure it is firmly locked in place.

10S-SRAM-CASSETTE

Spare parts

Need to replace a part on your bike? You'll find all our spare parts for your 29" XC 500 MTB here.

NEED SOME HELP?

Can't fix the problem on your bike, or can't find the solution to it? Please contact one of our technicians in store; they'll be glad to help!

User guides

INSTRUCTION MANUAL

Instruction Guide

BRAKING

Braking instructions

SUSPENSION 

Suspension instructions

Drive train

Drive train instructions

Wheels

Wheel instructions

Our commitments

ROCKRIDER guarantees the frame, handlebar and stem of your mountain bike for life (in normal conditions of use).

The guarantee for other parts is two years.

As soon as your child starts using the bike, some components will move slightly. It's for that reason that we offer a free check of your mountain bike six months after purchase. 

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