@all
evryone is right in there prospective ... The speedo reading is not correct when you change your rim size .. that im sure evryone has ...
Plus mostly one dosnt realise that its not dead straight .. attimes 2-5 degree slope...
if its down you can claim speeds of above (170 exi)05 (185 vti)05
if upwards then not more than 165- 170 exi 05 170-175 vti 05
Most important is Wind direction and speed .... at this speeds evry little thing matters
If head winds .. abv 15-20km no way you can cross 165 in vti
If tail winds of side tail then u can touch 190+ in vti ..
so u can test at times u cant touch the same speed while going frm lhr-isb .. as wehn coming back isb-lhr ...