Type: 5 (five) spoke and 6 (six) spoke: 
1) Track length: 1850mm; 
2) Beam size: Round 127mm, round 146mm, square 127mm & square 150mm; 
3) Brake: 420*180mm; 
4) Wheel fixing: 5-3/4"*10BSW for 5 spoke axle, 6-5/8"*18UNF for 6 spoke axle; 
5) PCD: 285.75mm; 
6) Bearing: HM518445/10 or HM212049/10 & HM218248/10 for 5 spoke axle, HM518445/10 or 740/742 & 759/752 for 6 spoke axle; 
7) Recommended wheel rim: 20" 

Remark: Other track length and ABS & automatic slack adjuster is available.