Memory card speed - Microsd with adapter

[Hachiroku]

Hello guys,
I'am using a 550D and looking for a fast card, because I want to record high bitrate video with the Qscale function.
I have a great deal on samsung 64gig class 10 micro sd card http://www.samsung.com/uk/consumer/memory-cards-hdd-odd/memory-cards/micro-sdhc-pro/MB-MG64DA/EU
As you see it is micro sd, if I would use it on my 550D with adapter, will it work with the same fast speed? Or the adapter slow it down? Please share any experience or thoughts with this topic. Thank you

[Walter Schulz]

You know your camera's SD-card interface is limited to about 21 MByte/s write rate?

[Hachiroku]

Yes, I know. I already have a slow x100 card and one faster 30mb/s card. With higher bitrate the slower one records only few seconds, while the faster one sometimes can record more than 30 seconds.

[Walter Schulz]

Micro-SD-adapters do not contain electronics. They are just mechanical adapters. No speed limit involved here.