When to change rear tyre ?

[blownygti]

Just had my bike MOT`d and bar a rear brake light switch it passed no problems, just had a new BT090 fitted to the front but I got an advisory notice that the rear tyre was close to the legal limit, I am obviously going to change it over the next few weeks once I get paid again, but when should you change ? 1.5mm 2mm ? is it unwise to ride my bike( in the dry ) with the current rear tyre being close to the limit ?
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https://www.bikepics.com/members/blownygti/90cbr400/Default.asp

[T1z3R]

when you can see the chord

obviously this is right after youve brought the tyre to within an inch of burnout hell
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duck my sick!

[virus]

You should only ever see the chord of a tyre on the remains of the side walls, after doing a burnout until it pops.
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own: 81 xs1100g...
owned: 85 rat CG (sold), 91 GS500e (stolen), 84 gsx400f (scrapped), 81 z250 (siezed, siezed, scrapped), 83 cb250rs (sold), 84 gpz750r ratfighter (killed) 84gpz400 (sold), '80 cb650 ratfighter (wrote off) 95gsx6/12f ratfighter (killed) 91 xj900 (sold)
stinkwheel Well I just had my hands up a pigs fanny. Which makes your concerns pale into insignificance.

[LeeR]

The legal limit is 1mm across 3/4 of the tread, my Suzuki manual advises changing the front at 1.6mm and the rear at 2mm.
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My claim to fame: Austin Vince nicked my pen...

[Fastkwak]

When it starts to feel a little vague back there legal or not its time for a change .Some tyres feel real good even when past the legal wear limit others go vague when still legal its a feel thing oh and a not getting caught thing if it is illegal ha ha
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Kiss my ASS im gone. current ZX12R previous ZZR1100,Gpz1100 uni,GT750,VT500,CX500
GT550,various Superdream 250&400,RD350LC,RD400DX,Ts250ER,DT175MX
CB125T superdream