Hi folks. I'm probably like alot of cyclists at the moment in relation to sourcing new components, I'm afraid the covid situation has affected supply. I'm looking to replace my 50 tooth out chain ring (shimano 105 5800). Apparently every supplier has none in stock. I'm wondering if shimano ultegra 6800 Chain rings will fit straight onto my 105 chainset as they a both 4 bolt and 110 degree. I've emailed one supplier who says no. But I've seen alot on the Internet that say yes. Has anybody got the correct answer. It would be most appreciated. Thankyou.