These winter tyres comes without studs and have a diameter of 20", width of 285 mm and a profile of 35%. The noise level of this model is 75dB, which is slightly higher.
From Tyres
Continental ContiWinterContact TS 830P (285/35 R20 104V)
Tirendo
Continental ContiWinterContact TS 830P ( 285/35 R20 104V XL, N0 )
This product is also available at 2 unverified merchants.