531 Magnum Seatpost Size

[retro_steel]

Hello, new to this site looking forward to coming on one or two west mids rides this year so Hello

Does anyone know the correct seatpost size for 531 Magnum used on a Peugeot Altitude

Many Thanks

Carl

PS Where's the link to add a signature?
________________________________________
1976 Tom Crowther Custom 531SL (TT Bike)
1983 Roberts Columbus SL (sons Road Bike)
1984 Brian Rourke 531Pro (daughters Road Bike)
1991 Marin Palisades Tange Prestige(daughters MTB)
1993 Mercian Strada Speciale 631 (Audax Bike)
199? Peugeot Altitude (sons MTB)
1996 Fausto Coppi K14 (Club Ride Bike)

Missing
My MTB/Trail Bike – What should I get?

 

[We_are_Stevo]

If the tubing is the same size as the blue 'Wot' in my sig then the seatpost is the same size as the cro-mega, 29.4 if memory serves me right?

 

[retro_steel]

If the tubing is the same size as the blue 'Wot' in my sig then the seatpost is the same size as the cro-mega, 29.4 if memory serves me right?

ATB has the same tube dims, so reckon thats the one then, thx - good lookin 'Wot'

 

[Coleman]

My 531 magnum is 30.0