Cotic droplink Rocket Gen4 Manuel utilisateur
2021 DROPLINK OWNERS MANUAL
WARNING
Cotic droplink models are bicycle frames designed for general off road XC, Trail, All Mountain and Enduro use only.
They are not Freeride or Downhill bikes. Performing large drops and jumps may cause damage to or failure of the
frame which could result in injury to the rider. Cotic Ltd does not take responsibility for any of these events. The frames
exceed the requirements of BS ISO4210.
Whilst Cotic endeavours to ensure that all items assembled at the factory are correctly and safely installed, it is the
responsibility of the owner to check all fasteners and components to satisfy themselves that the bicycle is safe to use.
If you do not feel qualified to make these assessments, you must ensure they are carried out prior to use of the bicycle
by a qualified bicycle shop mechanic.
All fasteners, component installations and components should be checked and maintained regularly to ensure the
continued safe operation of your bicycle. It is particularly recommended to check pivot bolts for tightness before and
after the first two rides to ensure safe operation.
Your Cotic droplink Bike
Your Cotic is a full suspension mountain bike for technical trail use. It uses the best materials for maximum strength
and durability in hard riding situations. Its carefully developed geometry ensures confident handling and fun.
Your Cotic is equipped with Cotic droplink suspension. This is a linkage driven design which combines the strength
and stiffness of a single swingarm with a finely controlled progressive shock rate. This keeps the back of your bike tied
firmly to the front and the shock rate gives you a positive platform to work from.
Overall Parameters
The Cotic droplinkbikes are designed to work optimally within certain limits of component size, shape and
performance. The frames handle better within these parameters. It's more fun as well as safer. The frame is not
designed to perform safely outside these limits. Using components which do not conform to the below requirements
voids the warranty and could result in unsafe handling traits or frame damage or failure, which could result in rider
injury.
Cotic Ltd does not take responsibility for any damage or injuries caused as a result of fitting an incorrect component
outside of the boundaries specified below.
Forks
Cotic droplink bikes should always be used with suspension forks, as follows:
droplink bikes are NOT approved for use with dual crown forks.
Shock
The rear shock droplink bikes are as follows:
The above droplink bikes use the following shock fittings (including UK made Jeht and FlareMAX frames):
Piggyback shocks may be used, usually with the piggyback reservoir installed at the down tube end, on the top of the
main barrel of the shock, with the exception of small size RocketMAX which must be fitted with the reservoir
underneath the shock at the seatstay end.
WARNING: If installed with the reservoir underneath, it could hit the frame before full travel is achieved if you are not
using a shock supplied by Cotic. If mounting the shock with the reservoir on the underside, let all the air out and fully
compress the shock to check clearance to the down tube. If fitting a brand of shock not supplied by Cotic then always
check clearance throughout the travel range to both top and down tubes and bottle cage if used, especially on size
Small and Medium frames. Whilst we have endeavoured to check clearances for shocks, we can't check all products,
or products which come to market after the designs are completed, therefore it is the responsibility of the owner of
the bicycle to check safe clearances are maintained through the travel.
droplink Model Wheel Minimum Fork Maximum Fork
(production date) Size Length/Travel (mm) Length/Travel (mm)
Rocket Gen4 539mm Static Length/ 563mm Static Length/
(March 2020) 27.5” / 650B 150mm Travel 170mm Travel
RocketMAX Gen3 561mm Static Length/ 573mm Static Length/
(March 2020) 29” 150mm Travel 160mm Travel
Jeht Gen1 541mm Static Length/ 563mm Static Length/
(Oct 2020) 29” 140mm Travel 150mm Travel
Flare Gen2 531mm Static Length/ 543mm Static Length/
(April 2019) 27.5” / 650B 130mm Travel 140mm Travel
FlareMAX Gen4 526mm Static Length/ 553mm Static Length/
29” 120mm Travel 140mm Travel
droplink Model Shock eye-to-eye Length (mm) Shock Stroke (mm)
Rocket Gen4 215 63
RocketMAX Gen3 230 60 or 62.5
Jeht Gen1 210
210
55
Flare Gen2 190 45 or 50
FlareMAX Gen4 50
(April 2021)
Top Shock Mounting M8 x 15.75mm wide
Bottom Shock Mounting M8 x 24.0mm wide
Jeht Gen1 and FlareMAX Gen4 Taiwan Series Production use different shock fittings:
Top Shock Mounting M8 x 20.0mm wide
Bottom Shock Mounting M8 x 24.0mm wide
Coil Shocks
Coil shocks may also be used if desired, but please seek advice from Cotic for spring rate. Our bikes are progressive in
nature and require stiffer springs than usually suggested by 3rd party suppliers and online spring calculators. If using
a spring without the advice of Cotic it will void your warranty. Too soft a spring leads to frame damage.
When using a coil shock, preload applied to the spring should be minimum 1 turn (to prevent the spring rattling loose),
and REGARDLESS OF THE SHOCK MANUFACTURERS INSTRUCTIONS no more the 3 turns of preload should be applied
to achieve the Cotic recommended sag for your model. If you require more than 3 turns of preload, you need a stiffer
spring. If you use more than 3 turns of preload, your warranty is void. Using more than 3 turns of preload can result
in coil binding before bottom out which will overload and damage your frame. Cotic is not responsible for this.
Brakes
Cotic droplink frames are equipped with International Standard
(IS) rear disc mountings. In order to maximise suspension
performance under braking the disc mount is positioned forward
of the top centre of the disc rotor. The placement distributes the
forces in a neutral direction. In order to achieve the best position
for the brake caliper the top bolt of the disc mount also forms
the shaft of the left side seatstay/swingarm pivot. The bike must
therefore never be ridden without a brake installed as the
seatstay pivot will not be fastened.
Minimum rear rotor size: 160mm.
Maximum rear rotor size: 203mm.
Front brake rotor size should be no larger than the maximum
recommended by the fork manufacturer and should not exceed
203mm diameter.
Tyres
Tyres larger than stated above could contact the frame whilst the bicycle is in use causing frame and/or tyre damage
which could lead to rider injury.
droplink Wheel ISO Maximum Maximum
Model Size Rim Size Tyre Width Wheel Diameter
Rocket 27.5”/650B 584 2.6” / 66mm 28.34” / 720mm
RocketMAX 29” 622 2.5” / 64mm 29.53” / 750mm
Jeht 29” 622 2.5” / 64mm 29.53” / 750mm
Flare 27.5”/650B 584 2.6” / 66mm 28.34” / 720mm
FlareMAX 29” 622 2.5” / 64mm 29.53” / 750mm
Headset
Droplink bikes are designed to use an external type bottom cup (regardless of steerer size) to maintain the geometry
of the bike. It is possible to install a 1 1/8” steerer fork using a crown race adaptor. Installing a 1 1/8” fork using a zero
stack bottom cup will steepen the geometry and drop the BB height. It will also result in fork crown adjusters not
having sufficient clearance from the down tube, thus allowing potential damage the frame and fork if the bars are
over-rotated. ZS44 lower cups are therefore not approved.
Specifically it is not safe to install a longer travel than recommended fork (eg 180mm travel or more on a Rocket) with
a 1 1/8” steerer and ZS44 bottom cup thinking that because the overall length of the system is similar to the approved
EC44 bottom cup/max fork length set up it will be safe. It won't. No matter what the headset-steerer combination,
forks longer than the maximum stated in the table above are not approved.
Use of offset bushings in the shock to alter the geometry is prohibited and invalidates the warranty. The tyre clearance
at full travel is not sufficient to allow the use of offset bushes and presents a danger to the rider and the safety of the
frame if used and invalidates the warranty.
Seatpost
The seatpost size is 31.6mm, using a 34.9mm clamp. Hose routing is provided along the down tube and through a
hole in the seat tube for internal or 'stealth' routed seatposts.
For internal 'Stealth' routed seatposts, the routing hole is on the front of the seat tube above the bottom bracket, but
below the droplink. Feed your remote cable/hose through by anchoring it to the outer cable pre-installed in the frame
and install as per the seatpost manufacturer instructions. Once installed, wrap the supplied Jagwire routing grommet
over the cable/hose and push into the seat tube hole until firmly in position. This will prevent water ingress at this
point.
To prevent frame damage, the seatpost should have a minimum of 100mm of insertion into the frame below the top
of the seat tube with the saddle set at the maximum height required by the rider, regardless of any minimum insertion
marker on the seatpost.
Failure to observe this minimum insertion of 100mm will result in premature frame failure and invalidation of your
warranty.
It is important to check and ensure that you can insert your dropper seatpost far enough into the frame to get your
correct pedalling height.
For maximum insertion measurements for your frame to check dropper post compatibility, please check the latest data
on the geometry chart on the product page of the website at www.cotic.co.uk.
droplink Model Top Cup Bottom Cup
All models April 2019 /
Flare Gen 2 onwards ZS44 / 28.6 (1 1/8”) EC44 / 40 (1.5”)
It is possible to fit various brands of angle adjust headset to the Cotic Droplink frame. Whilst this does not invalidate
any warranty, it does move the handling away from the layout we spent a great deal of time researching and
perfecting. We accept some people have different preferences to the handling of the bike, and all we ask is that you
proceed with care if fitting an angle adjust headset and take time to learn how the bike handles differently.
Rear Axle
The rear axle is a screw-through Syntace X-12 Boost148 type. The axle is supplied with the frame and requires a 5mm
Allen key to install and remove. The derailleur hanger is also Syntace X-12 Type1. Both regular and Shimano Direct
Mount versions of this hanger are available, but the frame is supplied with a regular version.
Pivot Bearings
All the pivots on the Cotic droplink bikes use standard 'deep groove' ball bearing cartridges or standard shock size
bushings. If noticeable rattle or play develops in the suspension system, yet all the pivot axle fasteners are tightened
correctly, then it is highly probable that the bearings require replacement.
The pivot bearings are as follows:
It is important to quote the ‘2RS’ addendum as this specifies the seal type. To ensure your Cotic Rocket performs at
its best we recommended that you buy the highest quality bearings from a reputable manufacturer (eg. Enduro, SKF,
NSK, etc).
The Seatstay/Swingarm pivot uses a 1/2” internal diameter bushing. This is identical in size to a regular shock bushing.
We install a high specification IGUS plain bearing, but if you are stuck without spares, any 1/2” shock bushing will fit
and be safe to use.
The bearings and bushings are press fitted into the frame housings. Old bearings should be knocked out carefully
using a drift and a hammer. New bearings should be pressed in square using a large vice with soft jaws into the
housings to prevent frame damage and ensure accurate alignment.
If you do not have the equipment to press the bearings in DO NOT attempt to install them using a hammer or similar
as you run the risk of damaging the frame.
When re-installing the pivot axles after changing the bearings, it is imperative that all the spacers and axles are installed
again correctly. When disassembling take note of the order in which assemblies came apart. Make sure they go back
together the same wa
All spares are available directly from us on our website:
https://www.cotic.co.uk/order/spares/
There is a full installation video for bearing replacement on our Youtube channel:
https://youtu.be/97XZBvnztl4
y. Use high quality grease on all surfaces.
droplink Model Rear Axle Width / Size
Rocket Boost148 x 12
RocketMAX Boost148 x 12
Jeht Boost148 x 12
Flare Boost148 x 12
FlareMAX Boost148 x 12
Pivot Bearing Quantity Axle Housing
Number per Frame Size Size
Main Pivot 6902-2RS 2 15mm 28mm
Droplink Seat Tube 6902-2RS 2 15mm 28mm
Droplink Seatstay End 608-2RS 2 8mm 22mm
Seatstay IGUS
Swingarm WSI-0809-08 2 1/2” 19/32”
Seatstay Swingarm
Fitting Size - 2 sets M6 15.8mm
DROPLINK PIVOT
ASSEMBLY
MAIN PIVOT
ASSEMBLY
SEATSTAY PIVOT
ASSEMBLY
PARTS LIST
608-2RS
Ce manuel convient aux modèles suivants
4
Table des matières
Autres manuels Cotic Vélo
