Pull out the top rack and put your bike on it. You have to lift your bike at an angle.
「上段ラックを引き出し、自転車を置いて斜めに持ち上げる」= Pull out the top rack and put your bike on it. You have to lift your bike at an angle.
「Two Tier Bike Rack」という言い方はオッケーです!^^
ボキャブラリー
pull out = 引き出す
top rack = 上段のラック
put ~ on ~ = ~を~に置く
bike = 自転車 (bicycleでもオッケー!)
lift = 持ち上げる
at an angle = 斜め
have to = ~しないといけない