when the revolution line roll out initially, all the wheels on the rolling stocks don't have spikes or spook on them. It was like after 2 years of releases, trackmaster starts using the spook wheels to help the trains to navigate the steep hills
My Trackmaster/Tomy/Plarail Photo Gallery Page (over 600+ photos and still under construction)
https://www.flickr.com/photos/183311600@N03/
https://www.flickr.com/photos/183311600@N03/
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