Spare Mount & Blade Key Weight Limit For Jeep Wrangler Spare Tire Mount?

Weight limit for jeep wrangler spare tire mount? - spare mount & blade key

I have a '04 Wrangler with 31 inch spare tire. I use a bicycle for replacement tires for 2 bikes to keep, but I do not want to overload that the tire assembly. Does anyone know the weight limit for the meeting? Also recommendations for the brand motorcycle?