Reddit mentions of Trixie 60922 Wooden Wheel, 21 cm

Oh I see what you mean! Yeah it has a decent sized stand you can kinda see below it half covered in bedding, got this one Trixie Wooden Wheel, 22 cm https://www.amazon.co.uk/dp/B008H2VA6G/ref=cm_sw_r_cp_apa_K1m5Bb46GPAZ8 taken them a good while.to chew through but they are getting there, had it for maybe 6 months now?

I've read before that corner digging is a learned behaviour and is related to stress (apparently it's common from gerbils brought from pet shops as they are often overcrowded). I had a gerbil who used to do that. I got her to stop by really going to town on enrichment. I would recommend getting a load of things to chew on, try blocking the corners with hanging chew toys and driftwood. I'll drop a few links below of things I found actually helpful, I've wasted a lot of money over the years on toys that they don't like so these are just the ones I recommend.

Here are some things that my gerbils go crazy for;

1. chew toys (this material in general they love, they also love wood with bark, avoid plain wood and fruit/coloured chews, never known a gerbil show interest in them and they end up getting tossed out with bedding) https://www.amazon.co.uk/Rosewood-Boredom-Breaker-Treat-Chain/dp/B00PUENT9U?ref_=Oct_BSellerS_471575031_44 - I'd remove the bell personally
   
   
2. boredom breakers https://www.amazon.co.uk/Rosewood-Boredom-Breaker-Animal-Activity/dp/B002NKD0BG?ref_=Oct_BSellerS_471575031_0
   
   
3. This wheel (22cm) can easily be suspended from their ceiling with some metal wire and is a must have because it's so quiet. Couldn't recommend it enough.
   https://www.amazon.co.uk/Trixie-Wooden-Wheel-22-cm/dp/B008H2VA6G?ref_=Oct_CABSellerC_13755519031_2&pf_rd_p=3e28c275-fcd8-5699-9995-a5ba5528b63f&pf_rd_s=mobile-hybrid-6&pf_rd_t=30901&pf_rd_i=13755519031&pf_rd_m=A3P5ROKL5A1OLE&pf_rd_r=SNRAXCADSZQJ00MTTZSX&pf_rd_r=SNRAXCADSZQJ00MTTZSX&pf_rd_p=3e28c275-fcd8-5699-9995-a5ba5528b63f
   
   Hope that helps!
   
   If some corner scratching persists, don't worry, sometimes that just happens. Hopefully they'll grow out of it!