TECHNICAL DATA

Resistance: mechanical (pad)
Resistance adjustment: manual
Resistance levels: micrometric / infinite
Flywheel mass: 18 kg
Max user weight: 120 kg
Transmission: silent belt
Crankset: 3-piece
Crank arm length: 17 cm
Pedal: iron structure with toe strap
Q factor TOTAL: 184 mm (LEFT 91 mm RIGHT 93 mm)
Ratio: 1 to 4.25
Drive: fixed gear
Emergency brake: pressure knob
Console: multi-information cycle computer 1 display
Data displayed: time, distance, speed, RPM, calories, heart rate
Programs: No
Handlebar: ergonomic multi-grip, rubber coating, Ø 34 mm
HRC receiver: 5.3 KHz integrated
Heart rate monitor strap: optional
Integrated sensors: No
Compatible apps: No
Mobile phone holder: Yes (tablet & smartphone)
Product dimensions: 107 x 51 cm H 125 cm
Saddle to pedal height: 72 / 90 cm
Saddle to handlebar distance: 41.5 / 49 cm
Saddle: anatomical, with central hole
Saddle adjustment: height with 7-hole selector, micrometric depth 7 cm
Handlebar adjustment: height with 6-hole selector
Stabilizers: with 2 rear self-leveling feet
Transport wheels: Yes
Packaging dimensions: 97 x 19 x 76 cm
Product weight: 33 kg
Gross weight: 36 kg
Product class: HC
Certifications: CE, RoHS, EN957

Technical features

The new JK 504 is a traditional spin bike with a mechanical pad brake and fixed-gear transmission with a silent belt. It features an inertial system with an 18 kg flywheel mass (balanced flywheel) and a 17 cm crank arm, ensuring smooth pedaling at all speeds. Resistance is adjusted via a manual selector control with "millimetric" resistance, which also acts as an emergency brake for sudden stops. The new JK 504 spin bike has 7-position saddle height adjustment (leg measurement from 72 cm to 90 cm) and 7 cm depth adjustment. The handlebar is adjustable to 5 heights and is covered in soft non-slip rubber; these adjustments help users find the best riding posture. The anatomical, racing design saddle with a central hole helps and improves the on-board sensation for all users, ensuring comfortable and long rides without discomfort. The non-slip racing pedal made of iron with a toe strap helps maintain the correct foot position during all phases of pedaling, even the most intense ones.

Workout monitoring

The JK 504 gym bike is equipped with a multi-information LCD cycle computer and also comes with a mobile phone/tablet holder, allowing real-time monitoring of all workout parameters, such as: time, distance, speed, RPM, calories, and heart rate.

Practicality and comfort

The sturdy steel frame of the JK 504 features wide stabilizers with four non-slip feet (rear self-leveling) and guarantees a maximum user weight of 120 kg, while at the front there are two transport wheels, which facilitate moving the spin bike from one room to another. The new JK 504 is a spinning bike that weighs 33 kg and is compact, measuring 107 x 51 cm H 125 cm; suitable for those who want good performance and practicality in a small space. JK Fitness offers the best spin bikes on the market with an excellent quality/price ratio.