That's just over 48 hours after City's Premier League fixture against Spurs at CCS.
Ticket details for West Ham (from official website) are as follows:
Tickets are priced as the following and will be on-sale from 10am Wednesday, 11th September to current Season Ticket holders and Gold Members – *Advance tickets need to be bought prior to 9am on Tuesday, 24th September.
Under-16s @ £10
Disabled Ticket Prices:
Relevant Prices Above & Carer Free Of Charge
Adult/Concessions @ £20
Under-16s @ £15
You can buy from the ticket office at Cardiff City Stadium, online at www.eticketing.co.uk/cardiffcity or call 0845 345 1400
Source: Cardiff City Online