Long overdue a topic for players convenience regarding the most relevant GSC OU speeds. The format is as follows: Speed + Pokemon + Explanation(Modifier if it exists) and further categorized in Tiers. Not every single speed / pokemon is accounted for but all the OU Viability Ranking were included. Additionally, I only included standard / expected Curse & Paralysis(common found paralysis targets) speeds in Tier 5 and where applicable in order to keep the list as ordered as possible (without unnecessary information). Without further ado I present:
Tier 1 Agility + Up to base 105
716 (Agility)
596 (Agility Recipient)
496 (Agility)
456 (Agility)
416 (Agility Recipient)
376 (Agility Recipient)
358 (Base 130)
338 (Base 120 )
336 (Agility Recipient)
328 (Base 115)
319 (Base 115 with 216 EVs & Base 130 with 100 EVs, -Speed EVs for priority Roar vs Raikou)
318 (Base 110 )
316 (Agility Recipient)
308 (Base 105)
Tier 2 Base 100 - 75
298 (Base 100)
288 (Base 95)
278 (Base 90)
272 (Base 87)
268 (Base 85)
258 (Base 80)
250 (Base 76)
248 (Base 75)
Tier 3 Base 70 - 55
238 (Base 70)
228 (Base 65)
220 (Base 61)
218 (Base 60)
208 (Base 55)
Tier 4 Base 50 - 30
198 (Base 50)
188 (Base 45)
183 (Curse-1)
178 (Base 40)
176 (Curse -1)
168 (Base 35)
158 (Base 30)
157 (Curse-1)
Tier 5 Curse / Paralysis Territory
145 (Curse -1)
143 (Curse-1)
139 (Curse-2)
137 (Curse -1)
134 (Curse -2)
130 (Curse -1)
124 (Curse -1)
119 (Curse -2)
117 (Curse -1)
110 (Curse -2)
109 (Curse-2)
108 (Base 5)
104 (Curse -1) / (Curse-2)
99 (Curse -2)
94 (Curse -2)
89 (Curse -2) / (Base 130 Paralyzed)
82 (Base 115 Paralyzed)
79 (Curse -2) / (Base 110 Paralyzed) / (319 Reduced Speed Evs Paralyzed)
74 (Base 100 Paralyzed)
67 (Base 85 Paralyzed)
63 (Curse-3)
59 (Base 70 Paralyzed)
57 (Base 65 Paralyzed)
55 (Base 61 Paralyzed)
52 (Base 55 Paralyzed) / (Curse-4)
47 (Base 45 Paralyzed)
44 (Base 40 Paralyzed) / (Curse-5)
39 (Base 30 Paralyzed) / (Curse-6)
GSC OU Speed Tiers
Tier 1 Agility + Up to base 105
716 (Agility)
596 (Agility Recipient)
496 (Agility)
456 (Agility)
416 (Agility Recipient)
376 (Agility Recipient)
358 (Base 130)
338 (Base 120 )
336 (Agility Recipient)
328 (Base 115)
319 (Base 115 with 216 EVs & Base 130 with 100 EVs, -Speed EVs for priority Roar vs Raikou)
318 (Base 110 )
316 (Agility Recipient)
308 (Base 105)
Tier 2 Base 100 - 75
298 (Base 100)
288 (Base 95)
278 (Base 90)
272 (Base 87)
268 (Base 85)
258 (Base 80)
250 (Base 76)
248 (Base 75)
Tier 3 Base 70 - 55
238 (Base 70)
228 (Base 65)
220 (Base 61)
218 (Base 60)
208 (Base 55)
Tier 4 Base 50 - 30
198 (Base 50)
188 (Base 45)
183 (Curse-1)
178 (Base 40)
176 (Curse -1)
168 (Base 35)
158 (Base 30)
157 (Curse-1)
Tier 5 Curse / Paralysis Territory
145 (Curse -1)
143 (Curse-1)
139 (Curse-2)
137 (Curse -1)
134 (Curse -2)
130 (Curse -1)
124 (Curse -1)
119 (Curse -2)
117 (Curse -1)
110 (Curse -2)
109 (Curse-2)
108 (Base 5)
104 (Curse -1) / (Curse-2)
99 (Curse -2)
94 (Curse -2)
89 (Curse -2) / (Base 130 Paralyzed)
82 (Base 115 Paralyzed)
79 (Curse -2) / (Base 110 Paralyzed) / (319 Reduced Speed Evs Paralyzed)
74 (Base 100 Paralyzed)
67 (Base 85 Paralyzed)
63 (Curse-3)
59 (Base 70 Paralyzed)
57 (Base 65 Paralyzed)
55 (Base 61 Paralyzed)
52 (Base 55 Paralyzed) / (Curse-4)
47 (Base 45 Paralyzed)
44 (Base 40 Paralyzed) / (Curse-5)
39 (Base 30 Paralyzed) / (Curse-6)