RAFKARNA / BIKE CARE WITH A PERSONAL TOUCH
National team mechanic
Head mechanic at Kasper C4M
Professional peloton experience for your bike. Precise work, personal advice and an agreed appointment.
THE PERSON YOU TRUST WITH YOUR BIKE
František Sisr knows the demands of top-level cycling from both sides: as a professional rider and as a mechanic.
Today he is a national team mechanic and head mechanic at Kasper C4M. At Rafkarna, he will discuss your bike's condition with you, recommend the right service and bring his racing experience to every detail of the work.
He also contributes to the technical development of IDEA wheels, combining a rider's experience, an understanding of design and daily work in the workshop.
Kasper C4M / professional cycling team
TRUSTED BY RIDERS
František Sisr really is one of the best
He is quick, reliable and solves every problem
A WORKSHOP WHERE DETAILS MATTER
Professional Park Tool equipment, genuine parts and procedures suited to your build. Quality care starts with the right diagnosis and ends with a thorough check.
We check spoke tension with a tension meter. Electronic shifting is checked with a diagnostic unit, including its software.
We use genuine components to match your groupset. Depending on the build, we select EZO bearings or Endurobearings ceramic bearings.
We agree the work and cost estimate when you bring in your bike. You know what the service includes and when you can get back in the saddle.
THREE WAYS TO GET YOUR BIKE READY
A specific problem
Routine check / complete preparation
ESTIMATED LABOUR TIME / 1 hour
A derailleur that will not shift, squealing brakes or an unusual noise? We find the cause and agree the right repair.
Choose an appointment
ESTIMATED LABOUR TIME / 3 hours
A check before a holiday, race or new season. We assess the bike and recommend work based on its actual wear.
Choose an appointment
ESTIMATED LABOUR TIME / 6 hours
Thorough care for demanding riding. We fully strip and inspect your bike, then replace worn components as agreed.
Choose an appointmentThe times shown are estimated labour hours for each package. We confirm the work and price when you bring in your bike; the collection date also depends on parts availability.
SERVICE IN DETAIL
Choose a part of your bike
and explore the work we offer
We check precise spoke tension with a Park Tool tension meter. For tubeless setups, we use milKit and Pirelli tyres.
For bearing replacements, we use Japanese EZO bearings or Endurobearings ceramic bearings, depending on the build.
Book this serviceHydraulic and cable brake servicing with professional Park Tool equipment. Replacement parts match the groupset on your bike.
We use genuine components and agree the required repairs when you bring in your bike.
Book this serviceWe check electronic groupsets with a diagnostic unit, including software checks and updates where needed. We also check drivetrain wear.
For replacements, we use genuine components to match your bike's groupset.
Book this serviceSpecialist replacement with Park Tool press tools. Precise installation matters as much as choosing the right bearing.
We use Japanese EZO bearings or Endurobearings ceramic bearings. Bottom brackets are replaced with genuine parts for the groupset.
Book this serviceFROM BOOKING TO YOUR NEXT RIDE
Book your drop-off appointment online. Discuss the work and price with František Sisr when you hand over your bike.
Open online bookingOpen our booking system and choose an available appointment. If you cannot find a suitable time, call us to discuss the options.
At drop-off, František Sisr will assess your bike with you, recommend the necessary service and agree the work, price and collection date.
When the required spare parts are in stock, we guarantee completion within 3 working days. Smaller jobs may be ready the next day, depending on the work and workshop capacity.
YOUR BIKE DESERVES PERSONAL CARE
František Sisr prepares the racing bikes of the professional Kasper C4M team. He brings the same precision and racing experience to your bike. Book a service appointment and discuss everything directly with him.
Book a service+420 605 519 369 Booking opens in ReservioFOR IDEA WHEEL AND FRAME OWNERS
Our workshop also services other brands. For our own IDEA wheelsets and carbon framesets, we provide long-term support and the following programmes.
A three-year warranty programme for IDEA wheelsets and carbon framesets. See the manual and warranty terms for details.
For a carbon rim with mechanical damage not covered by warranty, we offer a new rim at 40% off the retail price.
The first service for wheelsets bought from us is free within 12 months of purchase. We recommend a routine check once a year.
If a warranty or out-of-warranty repair takes longer than 4 weeks, we will lend you a demo wheelset free of charge.
DIRECT CONTACT WITH THE IDEA MANUFACTURER
IDEA wheelsets, R1 road bikes and S1 kick scooters are made in Czechia. Direct contact with the manufacturer combines design expertise with warranty and out-of-warranty care.
We guarantee spare parts availability for 3 years after a model is discontinued. If the original part is no longer available, we find a functional replacement from the current range.
A damaged frame or rim does not automatically mean the end of the component. A specialist mechanic assesses the damage, repair options and whether a repair is worthwhile. We can restore the original paintwork afterwards.
BEFORE YOUR VISIT
Yes. We offer full servicing for road, mountain and track bikes. At drop-off, František Sisr will discuss your bike's condition, the work needed and suitable components.
Choose an appointment in our Reservio booking system. If you cannot find a suitable time, call us. When the required spare parts are in stock, we guarantee completion within 3 working days. Smaller jobs may be ready the next day, depending on the work and workshop capacity.
Labour costs 700 CZK per hour including VAT, excluding parts and materials. We prepare an estimate at drop-off. Package times of 1, 3 and 6 hours are estimated labour hours; they are neither a fixed price nor a promised collection time.
If the wheels remain true and there is no play or unusual hub noise, we recommend an annual check. Routine servicing includes hub cleaning, bearing checks and spoke tension checks. Contact us sooner if a fault appears.
Yes, we can build a custom wheelset using carbon rims from our range. First we check your hubs' compatibility, drilling and the appropriate spoke pattern.
Unlike rim brakes, disc brakes do not repeatedly heat a rim braking surface. A wheel's condition still depends on how it is used, maintained and whether it has suffered mechanical damage. Regular checks help assess servicing needs.
We assess claims under the warranty terms. The replacement programme covers mechanical damage to a carbon rim outside warranty: it offers 40% off a new rim and can be used once within 1 year of purchase.
Provide the product model, a description of the problem, your contact details and, if available, the purchase document number. Include photos of any damage. Contact us first to agree the next steps and how to drop off or send the wheels.
IN PERSON IN HRADEC KRÁLOVÉ
For routine servicing, please book online. To discuss a warranty claim, rim replacement or a special request, contact us by phone or email.