8mm bearings are pretty standard these days if you can fit a #2 pencil through the center of your bearing it is an 8mm.  The size of your bearing is not dependent on the wheel it is dependent on your skate axel and most quad new skates come with 8mm and all inline skates require 8mm.  If you needed 7mm you would know that you had these specialized skates most likely.  99% of my bearing sales are 8mm so chances are you need 8mm.

 

BSB Swiss bearings are grease packed. You need to put on 50 or 100 miles before you do a race with them but they last much longer than an oiled bearing. As you skate the grease gets spun up against the shield where the inner race meets the shield and creates a barrier between the contaminants trying to get in and the balls and race.

BSB Swiss

$120.00Price
  • All returns for exchange or credit must be started within 14 days of delivery. Special orders and sale items may not be returned. We only accept unused products in original condition with original packaging for return. The returned item must be able to be resold as new. Boots, frames, wheels or bearings may not be mounted in any way to qualify for a credit. Boots may not be molded to qualify for a credit.

    All product returns except size exchanges are subject to a 15% restocking fee depending on the vendor. For size exchanges, there are no restocking fees. The shipping cost for any returned items is the sole responsibility of the customer. When your returned item has been received you will be credited for the item minus the restocking fee. If your returning equipment that initially had free shipping the initial shipping cost will be deducted from the amount credited back to you. As long as there is profit to take the initial shipping cost out of we will cover the initial shipping cost. But, if there is a return there is no profit to take the initial shipping cost out of.

    For exchanges, a payment for return shipment of $19.95 will be required.. For exchanges where Paypal was used for the initial purchase, a Paypal money request will be sent to you to pay shipping back to you.